List of levels for 139GD

Authors: P.K. Joshi, B. Singh, S. Singh, A.K. Jain | Citation: Nucl. Data Sheets 138, 1 (2016) | Cutoff date: 15-Oct-2016

1983Ni05: ¹³⁹Gd identified in ⁵⁰Cr(⁹²Mo,n2p) reaction at E=385 MeV. OASIS. Measured protons; semi telescope. Identification based on Q(ε)-S(p)=6.5 MeV, σ=70 mb, and agreement between measured T_1/2 and theoretical T_1/2=6.4 s from β decay gross theory (1973Ta30) and supported by cross bombardment of ⁵⁴Fe by ⁹²Mo which produced protons in the same energy range but much lower yield.

1988WiZN: measured beta-delayed E(p), (x ray)p coin, γp coin, T_1/2

1999Xi04: ¹⁰⁶Cd(³⁶Ar,X). Measured γγ(t), (x ray)γ(t); He-jet; half-lives, isomers, HPGe detectors. 1999Xi04 claim to have discovered two activities with nearly the same half-lives but with different spins, one a low-spin and the other a high-spin of 9/2-. However, the excitation functions obtained by 1999Xi04 for the two γ rays (115.8 and 121.6) from these two respective activities are nearly the same. Two separate decay schemes are presented but with no γ-ray intensities. In the opinion of the evaluators, sufficient details are absent to justify the existence of the two isomers.

2001BeZY (a report at Int. Conf. St. Marlo (France) in 1988): ¹³⁹Gd identified in ¹⁰⁶Cd(³⁶Ar,2pn) and ¹⁰⁶Cd(³⁵Cl,pn) using SARA system and He-jet transport. The following γ rays were listed as emitted by the decay of ¹³⁹Gd: 27.0, 65.0, 87.5, 116.3, 122.0, 236 and 379. Only the 27.0, 116.3 and 122.0 are present in 1999Xi04, a 26.7 and 121.6 from 4.8-s activity, and 115.8 from 5.8-s activity. The 65.0γ in 2001BeZY could be from ¹³⁸Gd decay

2003Xu04: ¹³⁹Gd produced in ¹⁰⁶Cd(⁴⁰Ca,α2pn),E=232 MeV reaction at Lanzhou-China accelerator facility. The β-delayed proton decay observed through the detection of 347- and 545-keV γ rays in ¹³⁸Sm

All data are from ⁹²Mo(⁵⁰Cr,n2pγ), except for the ground and isomeric properties. The decay scheme of ¹³⁹Tb ε decay is unknown

Gammas: In ¹³⁹Tb ε decay dataset, no levels are known, only two unplaced gamma rays of 109.0 and 119.7 keV are reported.

Q-value: Estimated uncertainties (2012Wa38): ΔQ(β^-)=360, ΔS(n)=280, ΔS(p)=200, ΔQ(α)=250

Q-value: Q(εp)=6580 200, S(2n)=22560 360, S(2p)=4180 200 (all from syst, 2012Wa38)

E(level): From least-squares fit to Eγ data; ΔEγ=1 keV assumed when not given.

J^π(level): From (9/2-) for the g.s.; multipolarities determined from DCO ratios, δ values and RUL; systematics of the lighter n=75 isotones, and γ deexcitation patterns. Ascending order of spins with excitation energy is assumed from yrast type population of states in this reaction

M(γ): Mult=Q indicates stretched quadrupole (most likely E2), mult=d indicates stretched dipole (most likely M1 or M1⁺E2, except E1 for 616γ from 17/2⁺ level) from DCO ratios. Mult=M1⁺E2 is from measured DCO ratio, significantly large δ value and implied RUL. Mult=E2 is from DCO ratio and RUL; level lifetimes are not listed but are implied as short (in ps region) from transition quadrupole moment deduced from these measurements in 1992Pa04

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Mixing Ratio	Conversion Coefficient	Additional Data
755.2	(15/2-)		225.3 3	M1+E2	-0.27 4	0.203	α=0.203 4, α(K)=0.170 3, α(L)=0.0254 4, α(M)=0.00554 9, α(N)=0.001274 21, α(O)=0.000196 3, α(P)=1.252×10^-5 23
1171.2	(17/2-)		416.2 3	M1+E2	-0.48 4	0.0372	α=0.0372 7, α(K)=0.0314 6, α(L)=0.00458 8, α(M)=0.000996 16, α(N)=0.000229 4, α(O)=3.53×10^-5 6, α(P)=2.28E-6 5
1415.7	(19/2-)		244.3 3	M1+E2	-0.26 7	0.163	α=0.163 3, α(K)=0.137 3, α(L)=0.0202 4, α(M)=0.00440 8, α(N)=0.001011 17, α(O)=0.0001558 24, α(P)=1.007×10^-5 24
1910.9	(21/2-)		495.1 3	M1+E2	-0.34 6	0.0247	α=0.0247 6, α(K)=0.0210 5, α(L)=0.00296 6, α(M)=0.000642 12, α(N)=0.000148 3, α(O)=2.29×10^-5 5, α(P)=1.53E-6 4
2238.0	(21/2+)		367	E2		0.0329	α=0.0329, α(K)=0.0259 4, α(L)=0.00545 8, α(M)=0.001224 18, α(N)=0.000278 4, α(O)=4.01×10^-5 6, α(P)=1.675E-6 24
2576.7	(25/2-)		402.1 3	M1+E2	-0.17 4	0.0437	α=0.0437, α(K)=0.0371 6, α(L)=0.00522 8, α(M)=0.001132 17, α(N)=0.000260 4, α(O)=4.05×10^-5 6, α(P)=2.72E-6 5
2697.0	(25/2+)		459	E2		0.01754	α=0.01754, α(K)=0.01415 20, α(L)=0.00264 4, α(M)=0.000588 9, α(N)=0.0001337 19, α(O)=1.97×10^-5 3, α(P)=9.41E-7 14
2766.8	(27/2-)		190.0 3	M1+E2	-0.17 6	0.328	α=0.328, α(K)=0.276 5, α(L)=0.0406 8, α(M)=0.00883 19, α(N)=0.00203 5, α(O)=0.000313 6, α(P)=2.04×10^-5 4
3288.2	(31/2-)		256.9 3	M1+E2	-0.27 4	0.1416	α=0.1416 23, α(K)=0.1192 20, α(L)=0.0175 3, α(M)=0.00382 6, α(N)=0.000878 13, α(O)=0.0001354 20, α(P)=8.76×10^-6 16
3627.7	(33/2-)		339.3 3	M1+E2	-0.20 7	0.0679	α=0.0679 13, α(K)=0.0575 12, α(L)=0.00819 12, α(M)=0.00178 3, α(N)=0.000409 6, α(O)=6.34×10^-5 10, α(P)=4.22E-6 9
3960.0	(35/2-)		332 1	M1+E2	-0.34 8	0.0701	α=0.0701 18, α(K)=0.0591 16, α(L)=0.00861 15, α(M)=0.00187 4, α(N)=0.000431 8, α(O)=6.65×10^-5 12, α(P)=4.32E-6 13

Q(β-)=-9500 keV SY	S(n)= 10050 keV SY	S(p)= 3170 keV SY	Q(α)= 2800 keV SY
Reference: 2012WA38

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A B	(9/2-)	5.8 s 9 % ε = 100 % εp > 0
0+X?			4.8 s 9 % ε = 100 % εp > 0
211.95 24	A	(11/2-)		212.0 3	100	D	0.0	(9/2-)
427.0 7	A	(7/2-)		215 427	11.1 15 100 19	D	211.95 0.0	(11/2-) (9/2-)
530.06 24	A	(13/2-)		318.2 3 530.0 3	100 10 46 5	D Q	211.95 0.0	(11/2-) (9/2-)
753.0 8	A	(11/2-)		326 753	100 8 20 8	(Q) D	427.0 0.0	(7/2-) (9/2-)
755.2 3	A	(15/2-)		225.3 3 543.2 3	86 9 100	M1+E2 Q	530.06 211.95	(13/2-) (11/2-)
1171.2 3	A	(17/2-)		416.2 3 641.0 3	100 11 83 9	M1+E2 Q	755.2 530.06	(15/2-) (13/2-)
1255.0 12	A	(15/2-)		502	100	Q	753.0	(11/2-)
1415.7 4	A	(19/2-)		244.3 3 660.4 3	38 5 100 11	M1+E2 Q	1171.2 755.2	(17/2-) (15/2-)
1626.0 12	A	(13/2+)		873	100		753.0	(11/2-)
1871.0 13	A	(17/2+)		245 616	6.1 12 100 4	Q D	1626.0 1255.0	(13/2+) (15/2-)
1882.0 14	A	(19/2-)		627	100	Q	1255.0	(15/2-)
1910.9 4	A	(21/2-)		495.1 3 740.0 3	71 9 100 12	M1+E2 Q	1415.7 1171.2	(19/2-) (17/2-)
2174.7 4	A	(23/2-)		264.0 3 758.9 3	27 3 100 10	D Q	1910.9 1415.7	(21/2-) (19/2-)
2174.7+Y	A			Y			2174.7	(23/2-)
2238.0 15	A	(21/2+)		356 367	12.2 24 100 4	E2	1882.0 1871.0	(19/2-) (17/2+)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2318.7+Y 10	A			144			2174.7+Y
2490.3 8	A			579 1075			1910.9 1415.7	(21/2-) (19/2-)
2576.7 4	A	(25/2-)		402.1 3 665.6 3	100 10 51 5	M1+E2 (Q)	2174.7 1910.9	(23/2-) (21/2-)
2590.0 18	A	(23/2-)		708	100	Q	1882.0	(19/2-)
2607.7+Y 15	A			289			2318.7+Y
2691.3 13	A			201			2490.3
2697.0 18	A	(25/2+)		459	100	E2	2238.0	(21/2+)
2766.8 5	A	(27/2-)		190.0 3 592.2 3	100 10 34 4	M1+E2 Q	2576.7 2174.7	(25/2-) (23/2-)
2919.3 17	A			228			2691.3
2944.7+Y 18	A			337			2607.7+Y
3031.4 5	A	(29/2-)		264.8 3 455 1	100 11 <17	Q	2766.8 2576.7	(27/2-) (25/2-)
3093.7 11	A			919?			2174.7	(23/2-)
3235.3 19	A			316			2919.3
3245.0 20	A	(29/2+)		548	100	Q	2697.0	(25/2+)
3257.0 20	A	(27/2-)		667	100	Q	2590.0	(23/2-)
3288.2 5	A	(31/2-)		256.9 3 521.2 3	100 11 38 5	M1+E2 Q	3031.4 2766.8	(29/2-) (27/2-)
3312.7+Y 20	A			368			2944.7+Y
3390.7 15	A			297			3093.7
3558.3 22	A			323			3235.3
3627.7 6	A	(33/2-)		339.3 3 596.4 3	100 12 <40	M1+E2	3288.2 3031.4	(31/2-) (29/2-)
3683.8 17	A			293 590?			3390.7 3093.7
3705.7+Y 23	A			393			3312.7+Y
3777.0 23	A	(31/2-)		520	100	Q	3257.0	(27/2-)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
3880.0 23	A	(33/2+)		635	100	Q	3245.0	(29/2+)
3960.0 8	A	(35/2-)		332 1 672	100	M1+E2	3627.7 3288.2	(33/2-) (31/2-)
4011.6 17	A			328 621			3683.8 3390.7
4108.7+Y 25	A			403			3705.7+Y
4370.6 9	A	(37/2-)		411 743			3960.0 3627.7	(35/2-) (33/2-)
4374.2 18	A			363 690			4011.6 3683.8
4417.0 25	A	(35/2-)		640	100		3777.0	(31/2-)
4600.0 25	A	(37/2+)		720			3880.0	(33/2+)
4768.3 11	A	(39/2-)		398 808			4370.6 3960.0	(37/2-) (35/2-)
4788.2 21	A			414			4374.2
5247.3 14	A	(41/2-)		479 877?			4768.3 4370.6	(39/2-) (37/2-)
5401 3	A	(41/2+)		801			4600.0	(37/2+)
5700.3 14 ?	A	(43/2-)		453? 932?			5247.3 4768.3	(41/2-) (39/2-)
6280 3	A	(45/2+)		879			5401	(41/2+)
7231 3	A	(49/2+)		951			6280	(45/2+)
8251 4	A	(53/2+)		1020			7231	(49/2+)
9340 4	A	(57/2+)		1089			8251	(53/2+)
10498 4 ?	A	(61/2+)		1158?			9340	(57/2+)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - ν9/2[514] α=-1/2.
0.0	(9/2-)	5.8 s 9 % ε = 100 % εp > 0
530.06 24	(13/2-)
1171.2 3	(17/2-)		416.2 3 641.0 3	100 11 83 9	M1+E2 Q	755.2 530.06	(15/2-) (13/2-)
1910.9 4	(21/2-)		495.1 3 740.0 3	71 9 100 12	M1+E2 Q	1415.7 1171.2	(19/2-) (17/2-)
2576.7 4	(25/2-)		402.1 3 665.6 3	100 10 51 5	M1+E2 (Q)	2174.7 1910.9	(23/2-) (21/2-)
3031.4 5	(29/2-)		264.8 3 455 1	100 11 <17	Q	2766.8 2576.7	(27/2-) (25/2-)
3627.7 6	(33/2-)		339.3 3 596.4 3	100 12 <40	M1+E2	3288.2 3031.4	(31/2-) (29/2-)
4370.6 9	(37/2-)		411 743			3960.0 3627.7	(35/2-) (33/2-)
5247.3 14	(41/2-)		479 877?			4768.3 4370.6	(39/2-) (37/2-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - ν9/2[514],α=+1/2.
211.95 24	(11/2-)
755.2 3	(15/2-)
1415.7 4	(19/2-)		244.3 3 660.4 3	38 5 100 11	M1+E2 Q	1171.2 755.2	(17/2-) (15/2-)
2174.7 4	(23/2-)		264.0 3 758.9 3	27 3 100 10	D Q	1910.9 1415.7	(21/2-) (19/2-)
2766.8 5	(27/2-)		190.0 3 592.2 3	100 10 34 4	M1+E2 Q	2576.7 2174.7	(25/2-) (23/2-)
3288.2 5	(31/2-)		256.9 3 521.2 3	100 11 38 5	M1+E2 Q	3031.4 2766.8	(29/2-) (27/2-)
3960.0 8	(35/2-)		332 1 672	100	M1+E2	3627.7 3288.2	(33/2-) (31/2-)
4768.3 11	(39/2-)		398 808			4370.6 3960.0	(37/2-) (35/2-)
5700.3 14	(43/2-)		453? 932?			5247.3 4768.3	(41/2-) (39/2-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - ν1/2[530] band.
427.0 7	(7/2-)
753.0 8	(11/2-)
1255.0 12	(15/2-)		502	100	Q	753.0	(11/2-)
1882.0 14	(19/2-)		627	100	Q	1255.0	(15/2-)
2590.0 18	(23/2-)		708	100	Q	1882.0	(19/2-)
3257.0 20	(27/2-)		667	100	Q	2590.0	(23/2-)
3777.0 23	(31/2-)		520	100	Q	3257.0	(27/2-)
4417.0 25	(35/2-)		640	100		3777.0	(31/2-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - ν1/2[660], Highly deformed band.
1626.0 12	(13/2+)
1871.0 13	(17/2+)
2238.0 15	(21/2+)		356 367	12.2 24 100 4	E2	1882.0 1871.0	(19/2-) (17/2+)
2697.0 18	(25/2+)		459	100	E2	2238.0	(21/2+)
3245.0 20	(29/2+)		548	100	Q	2697.0	(25/2+)
3880.0 23	(33/2+)		635	100	Q	3245.0	(29/2+)
4600.0 25	(37/2+)		720			3880.0	(33/2+)
5401 3	(41/2+)		801			4600.0	(37/2+)
6280 3	(45/2+)		879			5401	(41/2+)
7231 3	(49/2+)		951			6280	(45/2+)
8251 4	(53/2+)		1020			7231	(49/2+)
9340 4	(57/2+)		1089			8251	(53/2+)
10498 4	(61/2+)		1158?			9340	(57/2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 5 - ΔJ=(1) band.
2490.3 8
2691.3 13
2919.3 17			228			2691.3
3235.3 19			316			2919.3
3558.3 22			323			3235.3
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 6 - ΔJ=1 band.
3093.7 11
3390.7 15
3683.8 17			293 590?			3390.7 3093.7
4011.6 17			328 621			3683.8 3390.7
4374.2 18			363 690			4011.6 3683.8
4788.2 21			414			4374.2
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 7 - ΔJ=(1) band.
2174.7+Y
2318.7+Y 10
2607.7+Y 15			289			2318.7+Y
2944.7+Y 18			337			2607.7+Y
3312.7+Y 20			368			2944.7+Y
3705.7+Y 23			393			3312.7+Y
4108.7+Y 25			403			3705.7+Y

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	(9/2-)	5.8 s 9 % ε = 100 % εp > 0	E(level): ν9/2[514] α=-1/2.
211.95	(11/2-)		E(level): ν9/2[514],α=+1/2.
427.0	(7/2-)		E(level): ν1/2[530] band.
530.06	(13/2-)		E(level): ν9/2[514] α=-1/2.
753.0	(11/2-)		E(level): ν1/2[530] band.
755.2	(15/2-)		E(level): ν9/2[514],α=+1/2.
1171.2	(17/2-)		E(level): ν9/2[514] α=-1/2.
1255.0	(15/2-)		E(level): ν1/2[530] band.
1415.7	(19/2-)		E(level): ν9/2[514],α=+1/2.
1626.0	(13/2+)		E(level): ν1/2[660], Highly deformed band.
1871.0	(17/2+)		E(level): ν1/2[660], Highly deformed band.
1882.0	(19/2-)		E(level): ν1/2[530] band.
1910.9	(21/2-)		E(level): ν9/2[514] α=-1/2.
2174.7	(23/2-)		E(level): ν9/2[514],α=+1/2.
2174.7+Y			E(level): ΔJ=(1) band.
2238.0	(21/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
2318.7+Y			E(level): ΔJ=(1) band.
2490.3			E(level): ΔJ=(1) band.
2576.7	(25/2-)		E(level): ν9/2[514] α=-1/2.
2590.0	(23/2-)		E(level): ν1/2[530] band.
2607.7+Y			E(level): ΔJ=(1) band.
2691.3			E(level): ΔJ=(1) band.
2697.0	(25/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
2766.8	(27/2-)		E(level): ν9/2[514],α=+1/2.
2919.3			E(level): ΔJ=(1) band.
E(level)	J^π(level)	T_1/2(level)	Comments
2944.7+Y			E(level): ΔJ=(1) band.
3031.4	(29/2-)		E(level): ν9/2[514] α=-1/2.
3093.7			E(level): ΔJ=1 band.
3235.3			E(level): ΔJ=(1) band.
3245.0	(29/2+)		E(level): ν1/2[660], Highly deformed band.
3257.0	(27/2-)		E(level): ν1/2[530] band.
3288.2	(31/2-)		E(level): ν9/2[514],α=+1/2.
3312.7+Y			E(level): ΔJ=(1) band.
3390.7			E(level): ΔJ=1 band.
3558.3			E(level): ΔJ=(1) band.
3627.7	(33/2-)		E(level): ν9/2[514] α=-1/2.
3683.8			E(level): ΔJ=1 band.
3705.7+Y			E(level): ΔJ=(1) band.
3777.0	(31/2-)		E(level): ν1/2[530] band.
3880.0	(33/2+)		E(level): ν1/2[660], Highly deformed band.
3960.0	(35/2-)		E(level): ν9/2[514],α=+1/2.
4011.6			E(level): ΔJ=1 band.
4108.7+Y			E(level): ΔJ=(1) band.
4370.6	(37/2-)		E(level): ν9/2[514] α=-1/2.
4374.2			E(level): ΔJ=1 band.
4417.0	(35/2-)		E(level): ν1/2[530] band.
4600.0	(37/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
4768.3	(39/2-)		E(level): ν9/2[514],α=+1/2.
4788.2			E(level): ΔJ=1 band.
5247.3	(41/2-)		E(level): ν9/2[514] α=-1/2.
E(level)	J^π(level)	T_1/2(level)	Comments
5401	(41/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
5700.3	(43/2-)		E(level): ν9/2[514],α=+1/2.
6280	(45/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
7231	(49/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
8251	(53/2+)		E(level): ν1/2[660], Highly deformed band. Lifetime measured in 1992Pa04 (see F(\|t) curve in figure 2 of 1992Pa04).
9340	(57/2+)		E(level): ν1/2[660], Highly deformed band.
10498	(61/2+)		E(level): ν1/2[660], Highly deformed band.

E(level)	E(gamma)	Comments
753.0	326	M(γ): D+Q also possible from DCO ratio

References:
A	⁹²Mo(⁵⁰Cr,N2PG)	B	¹³⁹Tb ε decay (1.6 S)