ADOPTED LEVELS, GAMMAS for 161Gd
Author: C. W. Reich | Citation: Nucl. Data Sheets 112,2497 (2011) | Cutoff date: 1-Jun-2011
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=1955.8 keV 15 | S(n)= 5635.4 keV 10 | S(p)= 9314 keV 10 | Q(α)= -1252 keV 5 | ||
Reference: 2012WA38 |
References: | |||
A | 160Gd(d,p) | B | 160Gd(n,γ) E=TH |
C | 161Eu β- decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | Final Levels | |
0 | ABC | 5/2- | 3.66 m 5 % β- = 100 | |||
71.9 2 | A C | 7/2- | 71.9 2 | 0 | 5/2- | |
163.7 2 | A C | 9/2- | 91.9 2 163.7 2 | 71.9 0 | 7/2- 5/2- | |
276 3 | A | 11/2- | ||||
314.3 3 | ABC | 3/2- | 314.3 3 | 0 | 5/2- | |
355 1 | AB | 1/2- | ||||
394.7 1 | AB | 3/2- | 394.7 10 | 0 | 5/2- | |
438 3 | A | 7/2- | ||||
438 3 | A | 5/2- | ||||
510 3 | A | 9/2+ | ||||
529 3 | A | 7/2- | ||||
≈585 | A | 11/2+ | ||||
604 3 | A | 9/2- | ||||
645 3 | A | 11/2- | ||||
681 3 | A | 13/2+ | ||||
≈753 | A | 11/2- | ||||
804.3 1 | B | 804.3 10 | 0 | 5/2- | ||
≈809 | A | 5/2- | ||||
824 1 | B | 469.0 10 | 355 | 1/2- | ||
834 3 | A | (1/2,3/2)- | ||||
851 1 | B | |||||
889 3 | A | 7/2- | ||||
898 2 | B | |||||
925 3 | A | |||||
972 | A | |||||
994 3 | A | 9/2- | ||||
1036 1 | B | |||||
1049 5 | A | |||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | Final Levels | |
1097 5 | A | |||||
1123 5 | A | 11/2- | ||||
1128 1 | B | |||||
1177 5 | A | |||||
1273 1 | B | 1273 1 | 0 | 5/2- | ||
1311 1 | AB | 1/2- | ||||
1338 1 | AB | 3/2- | 1338 1 | 0 | 5/2- | |
1380 1 | AB | |||||
1403 5 | A | 5/2- | ||||
1408 1 | AB | |||||
1466 5 | A | 7/2- | ||||
1490 1 | AB | 1/2+ | 1490 1 | 0 | 5/2- | |
1501 5 | A | 3/2+ | ||||
1523 1 | AB | |||||
1545 1 | B | |||||
1556 5 | A | 5/2+ | ||||
1591 5 | A | 7/2+ | ||||
1615 5 | A | |||||
1643 5 | A | |||||
1664 5 | A | |||||
1751 1 | B | |||||
1803 1 | B | |||||
1848 1 | B | |||||
1923 1 | B |
Jπ(level): Band and Jπ assignments are from the (d,p) study (1967Tj01), except for the 834 level. They are based on agreement of measured and calculated dσ/d|W values, angular distributions, and energy separations within bands. See 160Gd(d,p) for authors’ comments on the definitiveness of the assignments.
E(γ): See the 160Gd(n,γ) data for the primary γ’s from the thermal-neutron capture state at 5635.4 keV.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 1 - 5/2[523] band. | |||||||
0 | 5/2- | 3.66 m 5 % β- = 100 | |||||
71.9 2 | 7/2- | 71.9 2 | 0 | 5/2- | |||
163.7 2 | 9/2- | 91.9 2 163.7 2 | 71.9 0 | 7/2- 5/2- | |||
276 3 | 11/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 2 - 3/2[521] band. | |||||||
314.3 3 | 3/2- | ||||||
438 3 | 7/2- | ||||||
645 3 | 11/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 3 - 1/2[521] band. | |||||||
355 1 | 1/2- | ||||||
394.7 1 | 3/2- | 394.7 10 | 0 | 5/2- | |||
438 3 | 5/2- | ||||||
529 3 | 7/2- | ||||||
604 3 | 9/2- | ||||||
≈753 | 11/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 4 - 7/2[633] band. | |||||||
510 3 | 9/2+ | ||||||
≈585 | 11/2+ | ||||||
681 3 | 13/2+ | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 5 - 5/2[512] band. | |||||||
≈809 | 5/2- | ||||||
889 3 | 7/2- | ||||||
994 3 | 9/2- | ||||||
1123 5 | 11/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 6 - 1/2[510] band. | |||||||
1311 1 | 1/2- | ||||||
1338 1 | 3/2- | 1338 1 | 0 | 5/2- | |||
1403 5 | 5/2- | ||||||
1466 5 | 7/2- | ||||||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
Band 7 - 1/2[651] band. | |||||||
1490 1 | 1/2+ | ||||||
1501 5 | 3/2+ | ||||||
1556 5 | 5/2+ | ||||||
1591 5 | 7/2+ |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | 5/2- | 3.66 m 5 % β- = 100 | E(level): 5/2[523] band. |
71.9 | 7/2- | E(level): 5/2[523] band. | |
163.7 | 9/2- | E(level): 5/2[523] band. | |
276 | 11/2- | E(level): 5/2[523] band. | |
314.3 | 3/2- | E(level): 3/2[521] band. | |
355 | 1/2- | E(level): 1/2[521] band. | |
394.7 | 3/2- | E(level): 1/2[521] band. | |
438 | 7/2- | E(level): 3/2[521] band. | |
438 | 5/2- | E(level): 1/2[521] band. Assigned as doublet in (d,p) (1967Tj01). | |
510 | 9/2+ | E(level): 7/2[633] band. | |
529 | 7/2- | E(level): 1/2[521] band. | |
585 | 11/2+ | E(level): 7/2[633] band. | |
604 | 9/2- | E(level): 1/2[521] band. | |
645 | 11/2- | E(level): 3/2[521] band. | |
681 | 13/2+ | E(level): 7/2[633] band. | |
753 | 11/2- | E(level): 1/2[521] band. | |
809 | 5/2- | E(level): 5/2[512] band. | |
834 | (1/2,3/2)- | Jπ(level): From L=1 in (p,p) for isobaric analog state (1973Me24). | |
889 | 7/2- | E(level): 5/2[512] band. | |
972 | Jπ(level): Tentatively assigned as 13/2 member of 9/2[624] by 1967Tj01, but assignment not adopted. | ||
994 | 9/2- | E(level): 5/2[512] band. | |
1123 | 11/2- | E(level): 5/2[512] band. | |
1311 | 1/2- | E(level): 1/2[510] band. | |
1338 | 3/2- | E(level): 1/2[510] band. | |
1403 | 5/2- | E(level): 1/2[510] band. | |
E(level) | Jπ(level) | T1/2(level) | Comments |
1466 | 7/2- | E(level): 1/2[510] band. | |
1490 | 1/2+ | E(level): 1/2[651] band. | |
1501 | 3/2+ | E(level): 1/2[651] band. | |
1556 | 5/2+ | E(level): 1/2[651] band. | |
1591 | 7/2+ | E(level): 1/2[651] band. |
Data are from only three measurements: 161Eu β- decay (1986Ma12), 160Gd(d,p) (1967Tj01), and 160Gd(n,γ) (1971Gr42).
Levels: 1971Ma41, 1973Ga29 (same results as 1971Ma41), and 1975Ma48 give calculated contributions of Nilsson states and vibrations to various bandheads. (All three papers have Soloviev as an author.) For levels which the authors associate with the experimental levels at 0, 314, 355, and 809 keV, the calculated contributions from the Nilsson states indicated here are from 84 to 98%. In contrast, for the 1/2- level at 1311 keV, the calculated contribution of the 1/2[510] Nilsson state varies from 0.7% to 27% with the other contributions from vibrational states.
Levels: Resonance parameters are given in the Atlas of Neutron Resonances (2006MuZX), which lists 57 neutron resonances, mostly having Jπ=1/2+. See, also, 1969Ka26 and 1974Ra23, as well as 1969Mu04 and 1973Mu14, previous publications by the author of 2006MuZX.
Gammas: No γ intensities are given here; see the 160Gd(n,γ) data for a few intensities given (in γ’s per 100 n captures).
Q-value: Note: Current evaluation has used the following Q record $ 1955.5 14 5635.4 10 9433 syst -1204 50 2009AuZZ
Q-value: 2003Au03 report the same values for Q(β-) and S(n). For S(p) and Q(α), 2003Au03 report 9430, from systematics, and 1200 50, respectively.