ADOPTED LEVELS, GAMMAS for 138La
Author: Jun Chen | Citation: Nucl. Data Sheets 146, 1 (2017) | Cutoff date: 30-Sep-2017
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=1052 keV 4 | S(n)= 7450 keV 4 | S(p)= 6087 keV 3 | Q(α)= -2053 keV 3 | ||
Reference: 2017WA10 |
References: | |||
A | 137Ba(3He,d) | B | 137Ba(α,t) |
C | 138Ba(p,nγ) | D | 139La(p,d) |
E | 139La(d,t) | F | 140Ce(d,α) |
G | 238U(12C,Fγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABCDEFG | 5+ | 1.03×10+11 y 1 % β- = 34.5 4 % ε = 65.5 4 | |||||
72.57 3 | ABCDEF | (3)+ | 116 ns 5 | 72.57 3 | 100 | (E2) | 0.0 | 5+ |
116.17 6 | ABCDEF | (2)+ | 43.6 1 | 100 | 72.57 | (3)+ | ||
161.19 6 | ABCDEF | (3)+ | 45.0 1 88.62 5 | 13 5 100 8 | 116.17 72.57 | (2)+ (3)+ | ||
192.18 5 | ABCDE | (2,3)+ | 76.01 8 119.64 5 | 100 9 41 3 | 116.17 72.57 | (2)+ (3)+ | ||
230.40 7 | ABCDEF | (4)+ | 157.8 1 230.4 2 | 4.6 6 100 9 | 72.57 0.0 | (3)+ 5+ | ||
292.96 7 | ABC F | (1)+ | 100.78 6 176.83 6 | 22 2 100 | 192.18 116.17 | (2,3)+ (2)+ | ||
413.30 6 | ABCDEF | 3+,4+ | 182.9 1 221.13 5 297.2 3 340.78 20 | 4.4 5 34 3 8.4 8 100 8 | 230.40 192.18 116.17 72.57 | (4)+ (2,3)+ (2)+ (3)+ | ||
479.25 13 | ABCDEF | 3+,4+ | 248.7 2 406.8 2 479.3 3 | 7.7 8 100 8 21 3 | 230.40 72.57 0.0 | (4)+ (3)+ 5+ | ||
510.44 6 | BC EF | 3+,4+ | 280.0 1 318.3 1 394.3 1 437.9 1 | 7.7 16 98 7 43 4 100 9 | 230.40 192.18 116.17 72.57 | (4)+ (2,3)+ (2)+ (3)+ | ||
518.68 15 | ABCDE | 3+,4+ | 357.6 2 445.9 3 518.5 4 | 17 2 100 9 15 2 | 161.19 72.57 0.0 | (3)+ (3)+ 5+ | ||
642.35 9 | ABC F | (2)+ | 131.9 1 229.3 2 450.2 2 481.0 3 526.2 3 569.5 2 | 9.7 9 43 4 33 3 100 15 11.8 9 58 6 | 510.44 413.30 192.18 161.19 116.17 72.57 | 3+,4+ 3+,4+ (2,3)+ (3)+ (2)+ (3)+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
737.67 9 | C E | (2)- | 227.3 1 324.4 2 444.7 3 545.4 2 576.4 2 | 25 2 6.0 6 49 5 23 2 100 8 | 510.44 413.30 292.96 192.18 161.19 | 3+,4+ 3+,4+ (1)+ (2,3)+ (3)+ | ||
738.80 20 | C EFG | (7)- | 2.0 µs 3 % IT = 100 | 738.8 2 | 100 | (M2) | 0.0 | 5+ |
770.5? | F | |||||||
823.33 12 | C EF | (1,2,3)- | 85.68 8 | 100 | 737.67 | (2)- | ||
836.6 6 | E G | (8-) | 97.8 5 | | 738.80 | (7)- | ||
842.79 16 | C F | 612.7 4 842.7 2 | 19 3 100 9 | 230.40 0.0 | (4)+ 5+ | |||
888 2 | E | |||||||
900.5 3 | C EF | (4,5)- | 670.0 3 900.8 5 | 56 7 100 10 | 230.40 0.0 | (4)+ 5+ | ||
915.3? | F | |||||||
929 3 | E | |||||||
936.30 19 | C EF | (4,5)- | 706.5 5 936.2 2 | 100 10 ≤233 | 230.40 0.0 | (4)+ 5+ | ||
947.79 17 | C | 105.0 1 717.4 3 | 28 3 100 10 | 842.79 230.40 | (4)+ | |||
961.4 5 | C EF | (4,5,6)- | 961.4 5 | 100 | 0.0 | 5+ | ||
1033 2 | E | |||||||
1057.77 16 | ABC | 1+,2+ | 765.0 3 865.6 3 941.3 3 985.3 3 | 36 4 33 3 ≤45 100 9 | 292.96 192.18 116.17 72.57 | (1)+ (2,3)+ (2)+ (3)+ | ||
1067 2 | E | (7,8)- | ||||||
1096 2 | A E | 1+,2+ | ||||||
1102.54 22 | C E | 910.4 3 941.3 3 | 100 10 ≤94 | 192.18 161.19 | (2,3)+ (3)+ | |||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1150 3 | AB E | |||||||
1155 5 | AB E | |||||||
1178 5 | A | 1+,2+ | ||||||
1200.3 3 | C E | 681.5 3 1200.5 5 | 100 10 78 13 | 518.68 0.0 | 3+,4+ 5+ | |||
1228.87 16 | A C E | 1+,2+ | 936.2 2 1067.5 3 1112.2 3 | ≤127 92 9 100 9 | 292.96 161.19 116.17 | (1)+ (3)+ (2)+ | ||
1243.0 3 | ABC | (4,5,6)- | 295.2 3 1243.0 5 | 100 9 89 21 | 947.79 0.0 | 5+ | ||
1257.0 7 | E G | (9)- | 420.3 4 | 100 | 836.6 | (8-) | ||
1267 1 | AB | - | ||||||
1302 2 | E | |||||||
1344 3 | E | |||||||
1358.8 3 | ABC | 1+,2+ | 535.5 3 621.0 4 | 34 9 100 18 | 823.33 737.67 | (1,2,3)- (2)- | ||
1375 2 | E | |||||||
1385.1 3 | C E | 874.6 3 971.8 5 | 100 11 ≤57 | 510.44 413.30 | 3+,4+ 3+,4+ | |||
1425 2 | AB E | 1+,2+ | ||||||
1455 2 | AB | 1+,2+ | ||||||
1466 2 | E | |||||||
1490.5 3 | C E | 971.8 5 1077.2 3 | ≤27 100 10 | 518.68 413.30 | 3+,4+ 3+,4+ | |||
1520 3 | E | |||||||
1531 2 | AB | 1+,2+ | ||||||
1545 3 | E | |||||||
1570 2 | AB E | 1+,2+ | ||||||
1581 2 | AB E | - | ||||||
1599 2 | E | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1624 4 | AB | 1+,2+ | ||||||
1645 2 | AB E | - | ||||||
1656 3 | E | |||||||
1676 3 | E | |||||||
1687 2 | AB E | 1+,2+ | ||||||
1707 2 | E | |||||||
1713 2 | AB | + | ||||||
1722.4 4 | C | 1309.1 5 1429.5 5 | | 413.30 292.96 | 3+,4+ (1)+ | |||
1733.45 23 | ABC E | 1+,2+ | 910.4 3 1090.8 3 | ≤122 100 10 | 823.33 642.35 | (1,2,3)- (2)+ | ||
1739 2 | E | |||||||
1756 4 | AB | + | ||||||
1788.4 4 | ABC E | + | 827.0 6 1270 1 1309.1 5 | 90 14 100 17 ≤124 | 961.4 518.68 479.25 | (4,5,6)- 3+,4+ 3+,4+ | ||
2001.6 6 | G | (10-) | 744.6 3 1165.0 3 | 25 6 100 13 | 1257.0 836.6 | (9)- (8-) | ||
2352.8 7 | G | (11-) | 351.2 3 | 100 | 2001.6 | (10-) | ||
2476.2 8 | G | (12-) | 123.4 3 | 100 | M1 | 2352.8 | (11-) | |
2938.6 9 | G | (13-) | 462.4 4 | 100 | 2476.2 | (12-) | ||
3190.0 9 | G | (14-) | 251.4 3 | 100 | 2938.6 | (13-) | ||
3514.8 9 | G | (13+) | 1038.6 5 | 100 | 2476.2 | (12-) | ||
3574.5 9 | G | (14-) | 1098.3 5 | 100 | 2476.2 | (12-) | ||
3725.8 10 | G | (14+) | 211.0 3 | 100 | 3514.8 | (13+) | ||
3771.7 10 | G | (14+) | 256.9 4 | 100 | 3514.8 | (13+) | ||
3960.8 10 | G | (15+) | 235.0 3 | 100 | 3725.8 | (14+) | ||
4099.1 10 | G | (15-) | 1160.6 5 | 100 | 2938.6 | (13-) | ||
4152.5 11 | G | (15+) | 380.8 5 | 100 | 3771.7 | (14+) | ||
4467.9 10 | G | (16-) | 368.8 5 1277.8 5 | 67 33 100 50 | 4099.1 3190.0 | (15-) (14-) |
E(level): From a least-squares fit to γ-ray energies where applicable, unless otherwise noted.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - γ cascade based on 7-. | |||||||
738.80 20 | (7)- | 2.0 µs 3 % IT = 100 | |||||
836.6 6 | (8-) | 97.8 5 | | 738.80 | (7)- | ||
1257.0 7 | (9)- | 420.3 4 | 100 | 836.6 | (8-) | ||
2001.6 6 | (10-) | 744.6 3 1165.0 3 | 25 6 100 13 | 1257.0 836.6 | (9)- (8-) | ||
2352.8 7 | (11-) | 351.2 3 | 100 | 2001.6 | (10-) | ||
2476.2 8 | (12-) | 123.4 3 | 100 | M1 | 2352.8 | (11-) | |
2938.6 9 | (13-) | 462.4 4 | 100 | 2476.2 | (12-) | ||
3190.0 9 | (14-) | 251.4 3 | 100 | 2938.6 | (13-) | ||
4467.9 10 | (16-) | 368.8 5 1277.8 5 | 67 33 100 50 | 4099.1 3190.0 | (15-) (14-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - γ cascade based on (13+) | |||||||
3514.8 9 | (13+) | ||||||
3771.7 10 | (14+) | 256.9 4 | 100 | 3514.8 | (13+) | ||
4152.5 11 | (15+) | 380.8 5 | 100 | 3771.7 | (14+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
72.57 | (3)+ | 116 ns 5 | 72.57 3 | (E2) | 6.33 | B(E2)(W.u.)=7.8 4, α=6.33, α(K)=3.00 5, α(L)=2.61 4, α(M)=0.581 9, α(N)=0.1229 18, α(O)=0.01723 25, α(P)=0.0001543 22 |
738.80 | (7)- | 2.0 µs 3 % IT = 100 | 738.8 2 | (M2) | 0.01513 | B(M2)(W.u.)=0.0026 +5-4, α=0.01513, α(K)=0.01288 18, α(L)=0.001781 25, α(M)=0.000372 6, α(N)=8.18×10-5 12, α(O)=1.331E-5 19, α(P)=1.037E-6 15 |
2476.2 | (12-) | 123.4 3 | M1 | 0.595 | α=0.595, α(K)=0.509 8, α(L)=0.0687 11, α(M)=0.01429 23, α(N)=0.00314 5, α(O)=0.000511 8, α(P)=3.96×10-5 7 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 5+ | 1.03×10+11 y 1 % β- = 34.5 4 % ε = 65.5 4 | μ=+3.713646 7 (1977Kr12,2014StZZ), Q=+0.39 3 (2003Ii03,2016St14) With the Adopted value of T1/2, the deduced |lβ-=(2.34 4)×10-12y-1, compared with the measured value |lβ-=(2.37 10)×10-12y-1 from 2000Ta24, obtained using a geophysical method. E(level): With the Adopted value of T1/2, the deduced |lβ-=(2.34 4)×10-12y-1, compared with the measured value |lβ-=(2.37 10)×10-12y-1 from 2000Ta24, obtained using a geophysical method. |
72.57 | (3)+ | 116 ns 5 | μ=+2.89 5 (1979Bo11,2014StZZ) Configuration=πg7/2~#νd3/2 (1975IsZY). |
479.25 | 3+,4+ | XREF: d(493). | |
518.68 | 3+,4+ | XREF: d(530). | |
738.80 | (7)- | 2.0 µs 3 % IT = 100 | E(level): γ cascade based on 7-. |
836.6 | (8-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
1257.0 | (9)- | E(level): γ cascade based on 7-. | |
1733.45 | 1+,2+ | XREF: B(1728)E(1726). | |
2001.6 | (10-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
2352.8 | (11-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
2476.2 | (12-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
2938.6 | (13-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
3190.0 | (14-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
3514.8 | (13+) | E(level): γ cascade based on (13+). Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
3574.5 | (14-) | Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
3725.8 | (14+) | Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
3771.7 | (14+) | E(level): γ cascade based on (13+). Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
3960.8 | (15+) | Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
4099.1 | (15-) | Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
4152.5 | (15+) | E(level): γ cascade based on (13+). Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. | |
4467.9 | (16-) | E(level): γ cascade based on 7-. Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions. |
E(level) | E(gamma) | Comments |
72.57 | 72.57 | M(γ): from 1975We16 in (p,nγ) based on RUL. Mult=M1 would require a half-life less than 0.1 ns. |
738.80 | 738.8 | E(γ): weighted average of 738.8 2 from (p,nγ) and 739.2 5 from (12C,Fγ). M(γ): proposed by 2014As02 in (12C,Fγ) based on transition energy and T1/2 |
836.6 | 97.8 | E(γ): From (12C,Fγ) |
1257.0 | 420.3 | E(γ): From (12C,Fγ) |
2001.6 | 744.6 | E(γ): From (12C,Fγ) I(γ): From (12C,Fγ) | 1165.0 | E(γ): From (12C,Fγ) I(γ): From (12C,Fγ) |
2352.8 | 351.2 | E(γ): From (12C,Fγ) |
2476.2 | 123.4 | E(γ): From (12C,Fγ) M(γ): from (12C,Fγ) based on measured α(exp)=0.5 2 (2014As02) |
2938.6 | 462.4 | E(γ): From (12C,Fγ) |
3190.0 | 251.4 | E(γ): From (12C,Fγ) |
3514.8 | 1038.6 | E(γ): From (12C,Fγ) |
3574.5 | 1098.3 | E(γ): From (12C,Fγ) |
3725.8 | 211.0 | E(γ): From (12C,Fγ) |
3771.7 | 256.9 | E(γ): From (12C,Fγ) |
3960.8 | 235.0 | E(γ): From (12C,Fγ) |
4099.1 | 1160.6 | E(γ): From (12C,Fγ) |
4152.5 | 380.8 | E(γ): From (12C,Fγ) |
4467.9 | 368.8 | E(γ): From (12C,Fγ) I(γ): From (12C,Fγ) | 1277.8 | E(γ): From (12C,Fγ) I(γ): From (12C,Fγ) |
First identification of 138La nuclide by Inghram et al.: Phys Rev 72, (1947) 967.
Other measurements:
2015Kh02: 139La(3He,X) E=38 MeV. Measured Eγ, Iγ. Deduced γ-ray strength functions, level densities.
2007By02: 138Ba(3He,t) E=420 MeV. Measured triton spectra. Deduced Gamow-Teller strength distributions. Total B(>)=5.8 16 up to the neutron threshold.
Theoretical calculations:
2014Ac01: calculated ground state and excited state magnetic moments
2009Ka16: calculated hyperfine structure
2008Ha20: calculated levels, J, π.
Q-value: S(2n)=16620 50, S(2p)=14758 4 (2017Wa10)