{"id":"aa6e5a0a-56bd-47fd-b582-b67270a72a39","arxiv_id":"2411.17407","paper_version":1,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":5,"one_line_summary":"This paper identifies a recurring pattern of three low-lying long-lived isomers in nine odd-odd transitional rare-earth nuclei and links it to the neutron 11/2-[505] intruder orbital.","lead":"Nine odd-odd rare-earth nuclei appear to each host three long-lived, low-energy isomeric states, a pattern the authors call an isomer triplet and attribute to particular proton and neutron orbitals. The paper uses a standard rotor-plus-two-quasiparticle model to assign spins and configurations in terbium isotopes and then extrapolates the systematics across the region, offering experimenters target states to measure.","discovery_kind":"new_application","skeptic_critique":{"model":"deepseek-v4-flash","headline":"TQRM isomer assignments rest on untabulated, neighbor-transferred EGM/EN parameters; without an explicit parameter table or sensitivity test, the 154Tb 12 keV and 156Tb 130 keV placements and the GM-violation inference are not independently checkable.","rationale":"The reader's weakest assumption correctly identifies the transferability of single-quasiparticle energies and EGM/EN parameters as the load-bearing premise. My independent reading confirms this: the paper's Section II explicitly relies on this transferability, and the transitional-region caveat is acknowledged in the text for 152Eu and in the general discussion. The most concrete manifestation is the unsubstantiated ΔE=12.3 keV for 154Tb and the unexplained small residual shift for the 156Tb 7- state, both of which cannot be checked without the input parameters. I also considered whether the claim of 'first explicit report of isomer triplets' could be the central weakness, but the paper's novelty claim is about the grouping and systematics, not individual data, and the ENSDF compilation supports the existence of three low-lying long-lived states in most listed nuclei; the selection-bias issue raised by the reader is real but secondary to the model-based characterization. The transferability concern does not refute the empirical pattern; it only challenges the TQRM-based spin/configuration assignments and the orbital-systematics explanation. The reader's CONDITIONAL verdict already accounts for this: the assignments should be accepted only after the parameter table and sensitivity analysis are supplied. Hence no verdict change is needed, and the appropriate concrete test is the one stated above. Credit is due for the careful orbital systematics compilation and for explicitly acknowledging the transitional-region caveats, which makes the missing input table a fixable omission rather than a fundamental flaw.","tokens_in":17237,"tokens_out":2974,"duration_ms":49340,"concrete_test":"Publish a complete input table for Tables 2 and 3: for every 2qp bandhead, list Ep, En, the rotational inertia parameter, EGM, EN, and the final E from Eq. (1). Then perform a sensitivity test: vary each EGM and EN by ±30 keV (the typical spread among neighboring odd-odd nuclei for the same 2qp configuration) and recompute the 154Tb 0-/3- splitting and the 156Tb 7- bandhead energy. If the 154Tb 3- moves outside 0-50 keV or the 156Tb 7- moves above 300 keV, the transferability assumption is falsified for these cases and the model-based assignments should be downgraded. An independent cross-check would be to re-derive the 154Tb g.s. doublet using EGM and EN values extracted from 152Eu or 156Tb for the same π3/2[411] ⊗ ν3/2[521] configuration and compare with the claimed 12.3 keV splitting.","verdict_should_be":"UNCHANGED","load_bearing_attack":"Section II states that EGM and EN are taken from neighboring odd-odd nuclei because the energy parameters are 'configuration specific and not nucleus specific.' Yet the paper never tabulates the EGM/EN values, moments of inertia, or the individual Ep, En, Erot contributions for any bandhead in Tables 2 and 3. The result that 154Tb has a 0- ground state with the GM-triplet partner 3- at only ~12 keV is presented as 'our empirical evaluation... has yielded a value of ΔE = 12.3 keV,' but no arithmetic is shown. Similarly, the 156Tb 7- assignment is placed at Ex≈130 keV, only ~9 keV above the bare Ep+En sum of 121 keV, implying a small residual interaction that is never specified. The transferability assumption is precisely the least safe part of the argument: the paper itself notes 'drastic changes in shape and structural properties' close to the transitional region and invokes such changes for 152Eu. If EGM/EN values from different neighboring nuclei differ by tens of keV (a realistic spread), the 12 keV placement could shift by more than its own value, potentially inverting the 0- and 3- order or moving the 3- above 100 keV. That would not destroy the empirical triplet listings, but it would invalidate the paper's model-based characterization of 154Tb and the unified orbital-systematics explanation. The concern is load-bearing because the stated 'characterization' of the triplet members, not the ENSDF data compilation, depends on these numbers.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"The paper surveys long-lived low-lying isomers in odd-odd rare-earth nuclei using ENSDF data and identifies nine nuclei (152Pm, 152Eu, 154Tb, 156Tb, 156Ho, 158Ho, 160Ho, 162Lu, 166Lu) that each exhibit an 'isomer triplet': a ground state plus two isomers with half-lives ≥1 s and energies below 500 keV. For 154Tb and 156Tb, the authors use a semi-empirical Two Quasiparticle Rotor Model (TQRM) to assign spins, parities, energies, and two-quasiparticle configurations to the triplet members, including the claims that 154Tb has a 0− ground state with the 3− partner at about 12 keV and that 156Tb has a 7− isomer at about 130 keV. The paper then extends the orbital systematics to the other triplet nuclei, arguing that the low-energy ν11/2[505] neutron intruder orbital is a recurring ingredient in the high-spin member of the triplets.","tokens_in":17558,"tokens_out":6467,"duration_ms":58458,"significance":"If the empirical triplet pattern and the TQRM assignments hold, the paper offers a valuable systemization of a distinctive low-energy structure in the transitional rare-earth region, and it gives specific, testable predictions (e.g., the very low-energy 3− isomer in 154Tb and the placement of the 156Tb 7− isomer). The ENSDF compilation and the 1qp orbital systematics are useful and transparent, and the identification of the ν11/2[505] role in several high-spin isomers is a plausible and falsifiable claim. However, the model-based characterizations of 154Tb and 156Tb are not reproducible from the manuscript as written, and the triplet selection criteria are applied inconsistently; these are fixable issues, but they are load-bearing for the paper's central modeling conclusions.","major_comments":[{"comment":"The TQRM bandhead energies are not reproducible because the numerical inputs are never tabulated. The paper states in Section II that EGM and EN are taken from neighboring odd-odd nuclei, but neither these values nor E0, Erot, or the final bandhead energies are listed for any state in Tables 2 and 3. In particular, the central result that the 3− state in 154Tb lies 12.3 keV above the 0− ground state is stated without showing the arithmetic or any input values, and the 156Tb 7− placement at Ex≈130 keV is only about 9 keV above the bare Ep+En sum, which implies an unstated residual interaction. Please provide a full parameter table and a worked calculation for at least the 154Tb ground-state doublet.","section":"Section II, Eqs. (1)–(3); Section III.B.1; Section III.A.3"},{"comment":"The transferability assumption for EGM and EN is load-bearing but untested. The paper argues that these parameters are 'configuration specific and not nucleus specific,' yet it also notes 'drastic changes in shape and structural properties' near the transitional region (Section IV.A.2) and quotes the 'region of sharp change in nuclear deformation' for 154Tb (Section III.B.1). If EGM or EN values taken from different neighboring odd-odd nuclei differ by tens of keV, the 12 keV placement could shift sign and invert the 0−/3− ordering, or move the 3− well above 100 keV. The authors should include a sensitivity test using the range of EGM/EN values available from neighboring nuclei, or explicitly justify why only one set of parameters is used.","section":"Section II; Section III.B.1; Section IV.A.2"},{"comment":"The stated N-range of the isomer triplets is inconsistent with the compiled data. Section I says 'Presently identified triplets include only nuclei with N=89/91/93,' but Table 1 and the abstract include 166Lu, which has N=95 (Z=71, A=166). Section IV.A.4 also treats 166Lu as an exception. Please correct the N-range claim or explicitly exclude 166Lu from that feature.","section":"Section I, feature (a); Table 1"},{"comment":"The selection criterion for an 'isomer triplet' (three states with E<500 keV and t1/2≥1 s) is not applied consistently. In Table 1, the 154Tb 3− and 7− isomers have unknown excitation energies (0+x and 0+y), and the two excited isomers in 162Lu have both unknown energies and unknown spins (X and Y). For these nuclei the 'low-lying' character and even the triplet assignment rest on model assumptions rather than on the ENSDF data. The authors should either specify how the 500 keV criterion is satisfied for each of the nine nuclei or separate 'empirical triplets' from 'candidate triplets'.","section":"Section I; Table 1"},{"comment":"There is an internal inconsistency regarding the 152Pm high-spin isomer. Table 4 lists the 152Pm high-spin isomer as Jπ=(8) with no orbital configuration, but Section IV.B later proposes Jπ=8− {π5/2[413] ⊗ ν11/2[505]}. If this proposed configuration is part of the claimed systematic role of ν11/2[505], then the table and the corresponding discussion should be updated to make the assignment explicit and to distinguish it from ENSDF-adopted data. As written, the table contradicts the text and weakens the systematics claim.","section":"Section IV.B; Table 4"}],"minor_comments":[{"comment":"The abstract says the analysis 'highlights the crucial role of high-spin intruder neutron orbital in the formation of these isomer triplets,' but Section IV.B explicitly states that 162Lu and 166Lu do not involve the ν11/2[505] orbital. Please qualify the abstract and summary to avoid overgeneralization.","section":"Abstract; Section IV.B"},{"comment":"The figure numbering is inconsistent: Section IV.B refers to 'Fig. 5' for the ν11/2[505] systematics, but the plot appears as Figure 6, while Figure 5 is the Pm orbital energy plot. Please renumber the figures and update the in-text references.","section":"Figures 5 and 6"},{"comment":"The name 'Gallagher-Moszcowski' should be spelled 'Gallagher-Moszkowski' (see reference [23] and the text).","section":"Throughout"},{"comment":"Entries such as '150+x', '0+x', and 'X' would benefit from explicit footnotes clarifying whether these are unknown energies, relative energies, or unmeasured quantities, so that the reader can distinguish measured from unmeasured values.","section":"Table 1"},{"comment":"The phrase 'It is needless to say that this extreme low energy difference...' is informal; please rephrase in a more neutral style.","section":"Section III.B.1"},{"comment":"The phrase 'our study exclusively reports the observation...' is too strong, since the data are compiled from ENSDF; consider 'compiles and systemizes' or 'reports the systematics of' instead.","section":"Section I; Section V"},{"comment":"The entry 'Of decay Eu152 and Eu152m' appears to be a garbled title; please correct reference [47] to the proper article title.","section":"Reference [47]"}],"recommendation":"major_revision","confidential_remarks":"The core empirical compilation is solid and the orbital-systematics discussion is useful, but the TQRM calculations need a complete parameter table and sensitivity analysis before the model-based assignments can be accepted. The paper is within the journal's scope and the deficiencies appear fixable within the manuscript's framework."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"The empirical half of this paper is genuinely new and worth attention. The authors have combed ENSDF and identified nine odd-odd nuclei in the light rare-earth region (N=89, 91, 93) that each have a ground state plus two low-lying long-lived isomers forming a triplet. That compilation, with spins, energies, and half-lives, is a real service. The recurring role of the low-lying ν11/2[505] intruder orbital in the high-spin member is a plausible organizing observation, and the figures on single-quasiparticle orbital systematics are instructive. The paper is also honest about ambiguities, notably in 152Eu and the Lu isotopes. These parts I would trust. The weak spot is the TQRM characterization of 154Tb and 156Tb. The load-bearing numbers, specifically the ΔE=12.3 keV doublet separation in 154Tb and the placement of the 156Tb 7- isomer at ~130 keV, rest on EGM and EN parameters taken from neighboring odd-odd nuclei. The paper never tabulates those parameters, the moments of inertia, or the individual Ep, En, Erot contributions to Eq. (1). The 12.3 keV value is asserted as 'our empirical evaluation' without showing the arithmetic. The 156Tb 7- placement at 130 keV sits only ~9 keV above the bare Ep+En sum, implying a residual interaction that is never specified. This matters because the transferability of EGM/EN is least safe in the transitional region, and the paper itself acknowledges drastic structural changes there. If those parameters differ by tens of keV between neighbors, the 154Tb 3- level could move above 100 keV or swap order with the 0-. That would not destroy the empirical triplet listings, but it would invalidate the model-based assignments and the unified systematics. The triplet selection also lacks a systematic completeness check; the authors list a few near-misses but do not show an exhaustive search of all odd-odd nuclei in 150<A<170. That is a moderate concern, not fatal. Who is this for? Nuclear structure experimentalists and anyone working with TQRM systematics. It deserves a serious referee, but the referee should demand a full parameter table, a sensitivity test for EGM/EN, and the arithmetic behind the 12.3 keV result. Without those, the model conclusions are not independently checkable. I would not cite the model assignments yet, but the empirical table and orbital systematics could be cited once revised.","headline":"Useful empirical survey of nine odd-odd rare-earth isomer triplets, followed by a semi-empirical model analysis whose key numbers are not checkable as written.","tokens_in":18136,"tokens_out":1743,"would_cite":false,"duration_ms":19145,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"This paper reports that nine odd-odd rare-earth nuclei near the deformed-to-spherical transition each host a ground state plus two low-lying long-lived isomers—an 'isomer triplet' pattern identified explicitly for the first time.","keywords":["isomer triplets","long-lived isomers","odd-odd deformed nuclei","light rare-earth region","two-quasiparticle rotor model","Gallagher-Moszkowski rule","11/2-[505] intruder orbital","transitional nuclear shapes"],"falsifier":"High-resolution gamma spectroscopy of the 24.4 h isomer in 156Tb could settle the claim: finding an about 80 keV E3 transition feeding the 49.6 keV 4+ state, or resolving the supposed doublet with the 88.4 keV line, would confirm the 7- assignment, whereas a different feeding pattern would falsify it. In 154Tb, a direct measurement showing the 9.4 h isomer more than about 100 keV above the ground state would falsify the 12 keV placement.","tokens_in":16966,"feed_emoji":"⚛️","tokens_out":7544,"duration_ms":68488,"temperature":0.7,"pith_summary":"This paper reports a structural pattern it says has not been explicitly noted before: in nine odd-odd rare-earth nuclei near the deformed-to-spherical transition (152Pm, 152Eu, 154Tb, 156Tb, 156Ho, 158Ho, 160Ho, 162Lu, and 166Lu), the lowest part of the level scheme consists of three long-lived states—a ground state and two isomers below 500 keV with half-lives of at least one second. Using the empirical two-quasiparticle rotor model, the authors assign spins, parities, energies, and orbital configurations to the members of the triplets in 154Tb and 156Tb, and extend the assignments to the other nuclei. The central insight is that the triplets are not accidents of individual nuclei: they follow the systematics of single-quasiparticle proton and neutron orbitals, in particular the low-energy intruder neutron orbital 11/2-[505], which couples to low-lying proton orbitals to make the high-spin member. If the assignments are right, the pattern gives a predictive handle on where low-lying long-lived isomers should appear in neighbouring transitional nuclei. The paper also documents an apparent violation of the Gallagher-Moszkowski rule in 154Tb, where the antiparallel 0- state lies below the parallel 3- partner.","feed_headline":"Isomer triplets appear in nine rare-earth nuclei","feed_subtitle":"A survey plus rotor-model assignments traces the pattern to one low-lying neutron intruder orbital.","key_machinery":"The carrying mechanism is the empirical Two Quasiparticle Rotor Model (TQRM) applied to the two unpaired nucleons in an odd-odd deformed nucleus. The model takes single-quasiparticle proton and neutron orbital energies from the nearest odd-mass isotope and isotone, couples them into Gallagher-Moszkowski doublets (a parallel-spin band K_+ = Omega_p + Omega_n and an antiparallel K_- = |Omega_p - Omega_n|), adds a rotational term, and applies configuration-specific GM splitting and, for K=0 bands, Newby-shift corrections transferred from neighbouring odd-odd nuclei. A surrounding survey of single-quasiparticle orbital systematics in the A=150-160 region supplies the key evidence: the neutron 11/2-[505] intruder orbital drops below about 200 keV in the relevant isotones, and the proton 3/2[411] and 5/2[402] orbitals swap roles near A=154. The systematics, not the model alone, carry the claim that one recurring intruder orbital explains the high-spin member of every triplet.","core_discovery":"The discovery claim is that 'isomer triplets'—a ground state plus two low-lying (E<500 keV) long-lived (t1/2>=1 s) isomers—form a common, previously unreported pattern in odd-odd nuclei with N=89, 91, and 93 in the light rare-earth region (A about 150-170). Nine nuclei are identified. The paper's model calculations assign the Tb triplets specifically: in 156Tb, the ground state is 3- {pi 3/2[411] x nu 3/2[521]}, the 5.3 h isomer is 0+ {pi 3/2[411] x nu 3/2[402]} at about 90 keV, and the 24.4 h isomer is 7- {pi 3/2[411] x nu 11/2[505]} at about 130 keV; in 154Tb, the ground state is 0- {pi 3/2[411] x nu 3/2[521]}, the 9.4 h isomer is 3- at about 12 keV, and the 22.7 h isomer is 7- {pi 3/2[411] x nu 11/2[505]} at or above 170 keV. The latter order violates the usual Gallagher-Moszkowski placement of the parallel triplet below the antiparallel singlet. Across all nine nuclei, the high-spin member is formed by the same intruder neutron orbital 11/2-[505] (except in the two Lu isotopes, where the pattern differs), and the low-spin members involve the near-ground neutron orbital 3/2-[521].","pith_inferences":["If the orbital-energy systematics are as regular as claimed, the same mechanism should produce previously unrecognized isomer triplets in neighbouring N=95 odd-odd isotones or in more neutron-rich isotopes beyond 166Lu; a targeted scan of evaluated decay data for A around 170-180 would be a cheap test.","The 154Tb Gallagher-Moszkowski rule violation is attributed to vibrational admixtures near the shape-transition region; a quantitative two-quasiparticle-plus-phonon calculation of the 0-/3- splitting could confirm the inferred 12 keV scale and would sharpen the paper's main structural claim.","The paper leaves 162Lu and 166Lu as exceptions whose high-spin isomers do not involve 11/2-[505]; studying them separately could reveal whether another intruder, such as an i13/2-related orbital, takes over, which would complement the proposed systematics.","The Delta I=3 absence of E3/M3 transitions between low-spin isomers and ground states remains unexplained; measuring those transition strengths in 152Pm, 152Eu, or 162Lu, where only beta decay has been seen, could show whether the paper's structure-based hindrance arguments are complete."],"forward_implications":["In 156Tb the 24.4 h isomer is identified as 7- at about 130 keV, with a possible 80 keV E3 branch that may be unresolved from the known 88.4 keV transition; high-resolution spectroscopy can test this directly.","In 154Tb the ground state is 0-, not 0+, and the 3- isomer sits only about 12 keV above it; this explains the non-observation of an isomeric transition and makes 154Tb a candidate for Gallagher-Moszkowski rule violation near the transition region.","The same orbital systematics predict that the 13.8 min high-spin isomer in 152Pm is 8- {pi 5/2[413] x nu 11/2[505]}, and that the 5.02 h isomer in 160Ho is 2- {pi 7/2[404] x nu 3/2[521]}.","Fifteen low-lying two-quasiparticle band heads in 156Tb and eighteen in 154Tb are proposed that have not yet been observed; they serve as location guides for future decay or transfer experiments.","The recurring J=0/3/7 pattern in Tb isotopes and the high-spin 7-/8-/9- members elsewhere mark a region where the low-lying intruder neutron orbital 11/2-[505] controls isomer formation."],"supporting_citations":[{"why":"Supplies the TQRM framework, the odd-odd structure review, and the two-quasiparticle-plus-phonon energies used for 154Tb.","marker":"[18]"},{"why":"Provides the TQRM energy formula with the Gallagher-Moszkowski and Newby-shift parameters.","marker":"[22]"},{"why":"Gives the Gallagher-Moszkowski doublet rule that orders the low-lying pair states and whose violation is central for 154Tb.","marker":"[23]"},{"why":"Is the evaluated nuclear data compilation from which the survey and the experimental levels, spins, and half-lives are taken.","marker":"[20]"},{"why":"Provides the isomer atlas context and the earlier observations of long-lived isomer patterns.","marker":"[13]"},{"why":"Established that the 154Tb ground state has J=0 and gave indirect evidence for the 3- to 0 transition.","marker":"[41]"},{"why":"Reported the 24.4 h isomer in 156Tb and its decay route.","marker":"[34]"},{"why":"Is the prior experimental report on low-energy spin-trap isomers in nearby Pm, Eu, and Tb isotones that the paper extends.","marker":"[17]"}],"fun_headline_variants":["Triple isomers: nine nuclei, one intruder neutron state","Nine odd-odd nuclei share a triple-isomer fingerprint","Isomer triplets in nine isotopes trace to a single orbital","Unusual isomer ordering surfaces in nine rare-earth nuclei","Isomer triplets: a systematic pattern in nine deformed nuclei"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The result depends on transferring single-quasiparticle orbital energies, Gallagher-Moszkowski splittings, and Newby shifts from neighbouring odd-mass and odd-odd nuclei to the target nucleus, even though the transitional region is exactly where those parameters may change with shape.","fun_headline_variants_meta":{"raw":{"variants":["Triple isomers: nine nuclei, one intruder neutron state","Nine odd-odd nuclei share a triple-isomer fingerprint","Isomer triplets in nine isotopes trace to a single orbital","Unusual isomer ordering surfaces in nine rare-earth nuclei","Isomer triplets: a systematic pattern in nine deformed nuclei"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000351,"raw_usage":{"total_tokens":2032,"prompt_tokens":1178,"completion_tokens":854,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":794,"completion_tokens_details":{"reasoning_tokens":771}},"tokens_in":794,"tokens_out":854,"duration_ms":9193,"temperature":1.0,"reasoning_tokens":771,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-12T12:08:51.578633+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"High-resolution gamma spectroscopy of the 24.4 h isomer in 156Tb could settle the claim: finding an about 80 keV E3 transition feeding the 49.6 keV 4+ state, or resolving the supposed doublet with the 88.4 keV line, would confirm the 7- assignment, whereas a different feeding pattern would falsify it. In 154Tb, a direct measurement showing the 9.4 h isomer more than about 100 keV above the ground state would falsify the 12 keV placement.","supporting_citations":[{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Supplies the TQRM framework, the odd-odd structure review, and the two-quasiparticle-plus-phonon energies used for 154Tb."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Provides the TQRM energy formula with the Gallagher-Moszkowski and Newby-shift parameters."},{"cited_title":"Bohr, Rotational motion in nuclei, Rev Mod Phys 48, (1976)","cited_arxiv_id":null,"evidence_quote":"Gives the Gallagher-Moszkowski doublet rule that orders the low-lying pair states and whose violation is central for 154Tb."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Is the evaluated nuclear data compilation from which the survey and the experimental levels, spins, and half-lives are taken."},{"cited_title":"In these cases, an M3/E3 transition can be expected to de-excite the nucleus to the g.s","cited_arxiv_id":null,"evidence_quote":"Provides the isomer atlas context and the earlier observations of long-lived isomer patterns."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Established that the 154Tb ground state has J=0 and gave indirect evidence for the 3- to 0 transition."},{"cited_title":"Toriyama et","cited_arxiv_id":null,"evidence_quote":"Reported the 24.4 h isomer in 156Tb and its decay route."},{"cited_title":"Mukherjee et al., Evidence of transverse wobbling motion in 151Eu, Phys","cited_arxiv_id":null,"evidence_quote":"Is the prior experimental report on low-energy spin-trap isomers in nearby Pm, Eu, and Tb isotones that the paper extends."}],"review_version":1}