List of levels for 84SE

ADOPTED LEVELS, GAMMAS for ⁸⁴Se

Authors: A.A. Sonzogni, M. Fadil, and B. Pfeiffer | Citation: Nucl. Data Sheets 110,2815 (2009) | Cutoff date: 30-Sep-2009

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=1835 keV 26	S(n)= 8678 keV 4	S(p)= 13567 keV 3	Q(α)= -8837.3 keV 28
Reference: 2012WA38

References:
A	⁸⁴As β^- decay (4.02 S)	B	⁸⁵As β^-n decay (2.021 S)
C	²⁵²Cf SF decay	D	⁸²Se(t,p)
E	Coulomb Excitation	F	¹⁹²Os(⁸²Se,xγ)
G	⁹Be,¹⁹⁷Au(⁸⁴Se,⁸⁴Se’γ)	H	²⁰⁸Pb(¹⁸O,xγ)
I	²³⁸U(p,Fγ):PROMPT γ	J	²³⁸U(⁸²Se,⁸⁴SeG)

⁸⁴Se evaluated by α.α. Sonzogni, M. Fadil, and B. Pfeiffer

Precise atomic mass measurement: 2008Ha23 (Penning-trap system). Other: 2006Ha62

α 1360 γ has been assigned feeding the 2121 level in ²⁵²Cf SF decay, while a 1361.4γ in ²⁰⁸Pb(¹⁶O,Fγ) (2004Pr10) and a 1361.5γ in ²³⁸U(p,Fγ) (2013DrZY) has been placed feeding the 3537 level from a 4898 level. Evaluator treats the placement in ²⁵²Cf SF decay as uncertain

Q-value: S(2n)=14496.4 24, S(2p)=25110.6 30 (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 C D E F G H I J	0+	3.26 m 10 % β^- = 100
1454.55 8	A B C D E F G H I J	2+	0.42 ps 7	1454.66 10	100	E2	0.0	0+
1967 3	D	(0+)
2097 11	D	(1-)
2121.65 10	A B C E F G H I J	4+	20.2 ps +41-26	666.99 7	100	E2	1454.55	2+
2244 7	D	0+
2461.38 9	A	(1,2+)		1007.12 10 2461.35 15	41.9 17 100 5		1454.55 0.0	2+ 0+
2654 4	D	0+
2699.47 12	A B	(2,3,4)		577.77 14 1245.0 4	100 3 82 6		2121.65 1454.55	4+ 2+
2716 10	D	(0+)
2740 11	D	(0+)
2984.75 13	A D J	2+		522.2 1530.19 10	9.5 100 5		2461.38 1454.55	(1,2+) 2+
3024.30 12	A D	(2+)		325.03 10 1569.53 10	5.3 16 100 3		2699.47 1454.55	(2,3,4) 2+
3069.77 22	A			1615.2 2	100		1454.55	2+
3125.97 15	A			426.4 2 1671.45 15	29 15 100 8		2699.47 1454.55	(2,3,4) 2+
3232.43 14	A			1110.77 10	100		2121.65	4+
3297.05 12	A B			1175.9 2 1843.24 24	9.8 8 100 3		2121.65 1454.55	4+ 2+
3370.54 16	A C F H I J	(6+)	8.2 ps +17-39	1248.88 13	100	[E2]	2121.65	4+
3408.73 14	A J			1287.06 10	100		2121.65	4+
3439.15 13	A J			1317.45 10 1984.7 2	100 5 23.6 14		2121.65 1454.55	4+ 2+
3481.7 10 ?	C			1360	100		2121.65	4+
3537.09 18	C F H I J	(5+)		1415.30 17	100		2121.65	4+
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
3541.23 10	A D G	2+		1080.15 10 2086.69 10	15.8 7 100 4		2461.38 1454.55	(1,2+) 2+
3548.3 3	A D			1426.6 3	100		2121.65	4+
3698 6	D
3701.47 19	C F H I J	(6+)		164.18 21 1580.00 21	41 8 100 15	D Q	3537.09 2121.65	(5+) 4+
3862.5 10	F			492.0?	100		3370.54	(6+)
3872.01 14	A			573.9 1750.35 10	21.4 100 4		3297.05 2121.65	4+
3928 9	D G	2+		2462 11	100		1454.55	2+
3985.27 22	A D	2+		1863.6 2	100		2121.65	4+
4082.18 22	A			1960.5 2	100		2121.65	4+
4106 17	D	0+
4116.33 17	A			574.9 2661.74 15	77 100 5		3541.23 1454.55	2+ 2+
4226 4	D	2+
4282.12 11	A			741.23 10 985.20 10 2159.0 2 4280.9 3	100 9 61.3 21 31.7 21 27.9 17		3541.23 3297.05 2121.65 0.0	2+ 4+ 0+
4307 7	D	(2+)
4405.8 3	C F H I	(7+)		704.34 24	100		3701.47	(6+)
4445.19 22	A D	(4+)		2323.5 2	100		2121.65	4+
4602 6	D	2+
4641.0	I J			1270.0			3370.54	(6+)
4670 9	D	(2+)
4723 6	D
4813 5	D	(2+)
4898.5 4	H I	(6+)		1361.4 4	100		3537.09	(5+)
4903 7	D	(2+,0+)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
4981 9	D	1-
5139 6	D	2+
5161.17 18	A			3039.46 15	100		2121.65	4+
5185 6	D	2+
5221.96 16	A			1925.5 2 2522.10 15	73 5 100 5		3297.05 2699.47	(2,3,4)
5258 6	D	4+
5295 9	D	2+
5329.9	I	(8+)		924.4			4405.8	(7+)
5373 9	D
5437 9	D	(5-)
5507 9	D	2+
5596.16 20	A D	3-		2299.0 2 3474.6 3	90 7 100 7		3297.05 2121.65	4+
5627 9	D	2+
5637.6 3	A			4182.9 3	100		1454.55	2+
5661.53 23	A			2962.0 2	100		2699.47	(2,3,4)
5725 14	D
5815 12	D	2+
5869.34 23	A			3169.4 3 3748.0 3	100 6 94 6		2699.47 2121.65	(2,3,4) 4+
5890.1 3	A D	(3-,1-)		4435.4 3	100		1454.55	2+
5922 9	D	(4+)
6005 12	D	(4+)
6019.90 19	A			2722.80 15	100		3297.05
6249.60 21	A			2840.8 2 4127.9 3	53 13 100 7		3408.73 2121.65	4+
6329 21	D	2+
6400.4 3	A D	4+		4945.7 3	100		1454.55	2+
6414.4	I	(9,10)		1084.5			5329.9	(8+)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
6541.5 3	A			5086.8 3	100		1454.55	2+
6604.6 3	A			5149.9 3	100		1454.55	2+

E(level): Levels connected by γ rays are from least-squares fit to Eγ; others are from ⁸²Se(t,p).

J^π(level): From L-values observed in ⁸²Se(t,p) (1988Mu02), unless otherwise stated.

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - Ground state sequence
0.0	0+	3.26 m 10 % β^- = 100
1454.55 8	2+	0.42 ps 7	1454.66 10	100	E2	0.0	0+
2121.65 10	4+	20.2 ps +41-26
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - Sequence based on (6⁺)
3701.47 19	(6+)
4405.8 3	(7+)		704.34 24	100		3701.47	(6+)
5329.9	(8+)
6414.4	(9,10)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Additional Data
1454.55	2+	0.42 ps 7	1454.66 10	E2	B(E2)(W.u.)=9.6 14
2121.65	4+	20.2 ps +41-26	666.99 7	E2	B(E2)(W.u.)=10.0 +16-17
3370.54	(6+)	8.2 ps +17-39	1248.88 13	[E2]	B(E2)(W.u.)=1.1 +8-2

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	0+	3.26 m 10 % β^- = 100	E(level): Ground state sequence.
1454.55	2+	0.42 ps 7	B(E2)=0.105 15 (2010Ga14) B(E2) from ¹⁹⁷Au(⁸⁴Se,⁸⁴Seg); deduced T_1/2_1/2=0.42 ps 7. E(level): Ground state sequence.
2121.65	4+	20.2 ps +41-26	E(level): Ground state sequence.
3408.73			XREF: J(?).
3701.47	(6+)		E(level): Sequence based on (6⁺).
3928	2+		XREF: d(3934).
4405.8	(7+)		E(level): Sequence based on (6⁺). L(t,p) has possible admixture of L=0 indicating possibility for a doublet.
4445.19	(4+)		E(level): L(t,p) has possible admixture of L=0 indicating possibility for a doublet.
4641.0			XREF: J(?).
5329.9	(8+)		E(level): Sequence based on (6⁺).
5437	(5-)		E(level): L(t,p) has possible admixture of L=0 indicating possibility for a doublet.
5922	(4+)		E(level): L(t,p) has possible admixture of L=0 indicating possibility for a doublet.
6005	(4+)		E(level): L(t,p) has possible admixture of L=0 indicating possibility for a doublet.
6414.4	(9,10)		E(level): Sequence based on (6⁺).

E(level)	E(gamma)	Comments
1454.55	1454.66	E(γ): weighted average of 1454.55 10 (⁸⁴As β^- decay), 1455.1 2 (⁸⁵As β^-n decay), 1454.5 2 (²⁰⁸Pb(¹⁸O,Xγ)), 1454.7 1 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=1455.1 (²⁵²Cf SF decay). M(γ): from ²⁰⁸Pb(¹⁸O,Xγ)
2121.65	666.99	E(γ): weighted average of 666.97 10 (⁸⁴As β^- decay), 667.1 2 (⁸⁵As β^-n decay), 666.8 3 (²⁰⁸Pb(¹⁸O,Xγ)), 667.0 1 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=667.1 (²⁵²Cf SF decay). M(γ): from ²⁰⁸Pb(¹⁸O,Xγ)
2699.47	577.77	E(γ): weighted average of 577.84 10 (⁸⁴As β^- decay), 577.5 2 (⁸⁵As β^-n decay) I(γ): weighted average of 100 3 (⁸⁴As β^- decay), 100 15 (⁸⁵As β^-n decay)
2699.47	1245.0	E(γ): weighted average of 1245.3 2 (⁸⁴As β^- decay), 1244.6 2 (⁸⁵As β^-n decay) I(γ): weighted average of 85 5 (⁸⁴As β^- decay), 67 12 (⁸⁵As β^-n decay)
3297.05	1843.24	E(γ): weighted average of 1843.13 10 (⁸⁴As β^- decay), 1843.7 2 (⁸⁵As β^-n decay) I(γ): from ⁸⁴As β^- decay
3370.54	1248.88	E(γ): weighted average of 1249.0 2 (⁸⁴As β^- decay), 1248.7 2 (²⁰⁸Pb(¹⁸O,Xγ)), 1249.0 3 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=1249.6 (²⁵²Cf SF decay).
3537.09	1415.30	E(γ): weighted average of 1415.3 2 (²⁰⁸Pb(¹⁸O,Xγ)), 1415.3 3 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=1415 (²⁵²Cf SF decay).
3701.47	164.18	E(γ): weighted average of 164.1 2 (²⁰⁸Pb(¹⁸O,Xγ)), 164.7 5 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=165 (²⁵²Cf SF decay). I(γ): weighted average of 80 40 (²⁰⁸Pb(¹⁸O,Xγ)), 39 8 (¹⁹²Os(⁸²Se,Xγ)) M(γ): from γ(θ) in ¹⁹²Os(⁸²Se,Xγ)
3701.47	1580.00	E(γ): weighted average of 1579.8 3 (²⁰⁸Pb(¹⁸O,Xγ)), 1580.2 3 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=1580 (²⁵²Cf SF decay). I(γ): weighted average of 100 21 (²⁰⁸Pb(¹⁸O,Xγ)), 100 22 (¹⁹²Os(⁸²Se,Xγ)) M(γ): from γ(θ) in ¹⁹²Os(⁸²Se,Xγ)
4405.8	704.34	E(γ): weighted average of 704.4 4 (²⁰⁸Pb(¹⁸O,Xγ)), 704.3 3 (¹⁹²Os(⁸²Se,Xγ)). Other: Eγ=703.5 (²⁵²Cf SF decay).