List of levels for 138LA

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)

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)

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A B C D E F G	5+	1.03×10⁺¹¹ y 1 % β^- = 34.5 4 % ε = 65.5 4
72.57 3	A B C D E F	(3)+	116 ns 5	72.57 3	100	(E2)	0.0	5+
116.17 6	A B C D E F	(2)+		43.6 1	100		72.57	(3)+
161.19 6	A B C D E F	(3)+		45.0 1 88.62 5	13 5 100 8		116.17 72.57	(2)+ (3)+
192.18 5	A B C D E	(2,3)+		76.01 8 119.64 5	100 9 41 3		116.17 72.57	(2)+ (3)+
230.40 7	A B C D E F	(4)+		157.8 1 230.4 2	4.6 6 100 9		72.57 0.0	(3)+ 5+
292.96 7	A B C F	(1)+		100.78 6 176.83 6	22 2 100		192.18 116.17	(2,3)+ (2)+
413.30 6	A B C D E F	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	A B C D E F	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	B C E F	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	A B C D E	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	A B C 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	J^π(level)	T_1/2(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 E F G	(7)-	2.0 µs 3 % IT = 100	738.8 2	100	(M2)	0.0	5+
770.5?	F
823.33 12	C E F	(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 E F	(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 E F	(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 E F	(4,5,6)-		961.4 5	100		0.0	5+
1033 2	E
1057.77 16	A B C	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	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1150 3	A B E
1155 5	A B 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	A B C	(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	A B	-
1302 2	E
1344 3	E
1358.8 3	A B C	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	A B E	1+,2+
1455 2	A B	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	A B	1+,2+
1545 3	E
1570 2	A B E	1+,2+
1581 2	A B E	-
1599 2	E
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1624 4	A B	1+,2+
1645 2	A B E	-
1656 3	E
1676 3	E
1687 2	A B E	1+,2+
1707 2	E
1713 2	A B	+
1722.4 4	C			1309.1 5 1429.5 5			413.30 292.96	3+,4+ (1)+
1733.45 23	A B C 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	A B	+
1788.4 4	A B C 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)	J^π(level)	T_1/2(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)	J^π(level)	T_1/2(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)	J^π(level)	T_1/2(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

E(level)	J^π(level)	T_1/2(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 T_1/2, the deduced \|l_β^-=(2.34 4)×10^-12y^-1, compared with the measured value \|l_β^-=(2.37 10)×10^-12y^-1 from 2000Ta24, obtained using a geophysical method. E(level): With the Adopted value of T_1/2, the deduced \|l_β^-=(2.34 4)×10^-12y^-1, compared with the measured value \|l_β^-=(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=πg_7/2~#νd_3/2 (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-. J^π(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-. J^π(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-. J^π(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-. J^π(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-. J^π(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-. J^π(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⁺). J^π(level): Proposed by 2014As02 in (¹²C,Fγ) based on band structures and comparisons with shell-model predictions.
3574.5	(14-)		J^π(level): Proposed by 2014As02 in (¹²C,Fγ) based on band structures and comparisons with shell-model predictions.
3725.8	(14+)		J^π(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⁺). J^π(level): Proposed by 2014As02 in (¹²C,Fγ) based on band structures and comparisons with shell-model predictions.
3960.8	(15+)		J^π(level): Proposed by 2014As02 in (¹²C,Fγ) based on band structures and comparisons with shell-model predictions.
4099.1	(15-)		J^π(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⁺). J^π(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-. J^π(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 T_1/2
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)
2001.6	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)
4467.9	1277.8	E(γ): From (¹²C,Fγ) I(γ): From (¹²C,Fγ)