List of levels for 137XE

ADOPTED LEVELS, GAMMAS for ¹³⁷Xe

Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 108,2173 (2007) | Cutoff date: 1-Oct-2006

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=4162.4 keV 4	S(n)= 4025.56 keV 10	S(p)= 10127 keV 15	Q(α)= -1876 keV 4
Reference: 2012WA38

References:
A	¹³⁷I β^- decay:Neutron	B	¹³⁷I β^- decay:γ
C	¹³⁸I β^-n decay	D	²⁴⁸Cm SF decay
E	¹³⁶Xe(n,γ) E=THERMAL	F	¹³⁶Xe(d,p)

Photo-fission fragment yield: 2005Ga50,2004Ga60,2003Ga21, 2002Ib01

n-,p-induced fission yields: 2000Lh02

Levels: E(level)|>4103 keV decay by neutron emission and some also by γ rays.

Q-value: Note: Current evaluation has used the following Q record 4166 74025.53 1110170 50 2003Au03

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	7/2-	3.818 m 13 % β^- = 100
601.05 7	B C E F	3/2-	< 0.25 ns	601.05 7	100		0.0	7/2-
986.20 10	B C E F	(1/2)-		385.15 7	100		601.05	3/2-
1218.00 10	B F	9/2-		1218.00 10	100		0.0	7/2-
1220.07 15	B D F	11/2-		1220.07 15	100	E2	0.0	7/2-
1302.73 7	B E F	5/2-		316.28 20 701.79 7 1302.64 7	2 10 100		986.20 601.05 0.0	(1/2)- 3/2- 7/2-
1461.28 18 ?	E	(1/2,3/2)		860.27 14	100		601.05	3/2-
1512.16 7	B			1512.16 7	100		0.0	7/2-
1534.32 7	B F	(5/2)-		1534.32 7	100		0.0	7/2-
1621.1 2	D	15/2-		400.10 10	100	E2	1220.07	11/2-
1668.13 15	B E	(1/2,3/2)		682.00 7 1066.9 3	67 100		986.20 601.05	(1/2)- 3/2-
1715.55 10	B E	3/2-,5/2,7/2-		412.97 15 1114.4 3 1715.51 10	24 46 100		1302.73 601.05 0.0	5/2- 3/2- 7/2-
1752.56 15	B			532.49 10	100		1220.07	11/2-
1766.17 10	B	3/2-,5/2,7/2-		463.9 3 1165.00 15 1766.12 10	20 8 100		1302.73 601.05 0.0	5/2- 3/2- 7/2-
1796.08 15	B			283.78 10 576.01 7 578.22 7	13 100 75		1512.16 1220.07 1218.00	11/2- 9/2-
1808.75 10	B			1808.75 10	100		0.0	7/2-
1820.56 10	B			1820.56 10	100		0.0	7/2-
1841.49 25	B E	(3/2-)		538.93 10 1841.49 13	100 30		1302.73 0.0	5/2- 7/2-
1849.69 10	B	3/2-,5/2,7/2-		547.20 7 1248.55 7 1849.38 15	47 100 39		1302.73 601.05 0.0	5/2- 3/2- 7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1873.13 10	B			570.51 7 655.29 20 1873.00 10	16 9 100		1302.73 1218.00 0.0	5/2- 9/2- 7/2-
1879.26 20	B			659.21 10 1879.2 5	100 23		1220.07 0.0	11/2- 7/2-
1898.3 3	B			1898.3 3	100		0.0	7/2-
1926.4 3	B			1926.4 3	100		0.0	7/2-
1935.2 3	D	19/2-	10.1 ns 9	314.10 10	100	E2	1621.1	15/2-
1936.05 10	B E	(3/2-)		268.35 15 633.46 7 950.18 13 1335.49 14 1936.03 15	60 46 100 71 63		1668.13 1302.73 986.20 601.05 0.0	(1/2,3/2) 5/2- (1/2)- 3/2- 7/2-
1991.18 15	B			773.16 7 1991.21 15	100 25		1218.00 0.0	9/2- 7/2-
1997.06 7	B			694.61 20 1997.04 7	17 100		1302.73 0.0	5/2- 7/2-
2010.80 17	B			1409.75 15	100		601.05	3/2-
2013.1 3	B			2013.1 3	100		0.0	7/2-
2029.8 7	B			727.31 15 811.84 7 2029.82 7	4 13 100		1302.73 1218.00 0.0	5/2- 9/2- 7/2-
2088.0 3	B			867.75 20 869.92 20	86 100		1220.07 1218.00	11/2- 9/2-
2089.67 25	B			1103.6 3 1488.62 20	38 100		986.20 601.05	(1/2)- 3/2-
2099.97 10	B			565.73 10 882.13 7 2099.85 10	25 70 100		1534.32 1218.00 0.0	(5/2)- 9/2- 7/2-
2114.0 4	B			2113.99 40	100		0.0	7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2144.32 25	B			1158.42 15 1543.3 3	90 100		986.20 601.05	(1/2)- 3/2-
2147.00 20	B			927.1 3 2146.97 20	100 59		1220.07 0.0	11/2- 7/2-
2155.11 20	B			852.4 5 937.19 20 1553.98 15	24 86 100		1302.73 1218.00 601.05	5/2- 9/2- 3/2-
2191.19 15	B			888.43 15 973.49 15 2190.95 15	63 75 100		1302.73 1218.00 0.0	5/2- 9/2- 7/2-
2196.15 15	B E	(1/2-,3/2)		893.42 7	100		1302.73	5/2-
2204.0 6	D	(19/2-)		101.1 10 269.7 3	<5.263 100	D	2099.97 1935.2	19/2-
2229.97 15	B			2229.97 15	100		0.0	7/2-
2237.76 25	B			725.52 15 2238.1 4	100 46		1512.16 0.0	7/2-
2244.09 15	B			252.83 7 394.52 7 435.28 7 477.98 7 709.71 10 941.41 7	21 69 51 58 42 100		1991.18 1849.69 1808.75 1766.17 1534.32 1302.73	3/2-,5/2,7/2- 3/2-,5/2,7/2- (5/2)- 5/2-
2281.59 20	B			1680.54 15	100		601.05	3/2-
2345.65 15	B			834.4 3 1127.59 10 2345.71 15	24 100 82		1512.16 1218.00 0.0	9/2- 7/2-
2356.28 15	B			1755.22 15 2356.29 15	100 82		601.05 0.0	3/2- 7/2-
2368.32 15	B			1150.35 10 2368.24 20	100 40		1218.00 0.0	9/2- 7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2380.30 15	B			2380.30 20	100		0.0	7/2-
2422.70 10	B			2422.70 10	100		0.0	7/2-
2444.0 3	B			1224.01 20	100		1220.07	11/2-
2452.4 3	E	1/2,3/2		1466.23 20	100		986.20	(1/2)-
2474.84 20	B			1256.76 15 2474.91 20	90 100		1218.00 0.0	9/2- 7/2-
2490.38 10	E	(3/2-)		1187.55 19 1504.30 15 1889.21 25 2490.48 16	58 100 25 84		1302.73 986.20 601.05 0.0	5/2- (1/2)- 3/2- 7/2-
2566.9 6	B			2566.93 60	100		0.0	7/2-
2571.09 15	B			1351.02 10	100		1220.07	11/2-
2608.8 5	E			893.23 15 2007.8 4	≤100 10		1715.55 601.05	3/2-,5/2,7/2- 3/2-
2629.70 10	B			877.15 20 2629.70 10	9 100		1752.56 0.0	7/2-
2671.59 20	B			2671.59 20	100		0.0	7/2-
2676.30 20	B			1456.39 10 2674.9 6	100 29		1220.07 0.0	11/2- 7/2-
2726.14 20	B			2726.14 20	100		0.0	7/2-
2829.8 3	B			2829.8 3	100		0.0	7/2-
2844.50 15	B			2243.45 10	100		601.05	3/2-
2909.8 4	B			2909.8 4	100		0.0	7/2-
2922.6 3	B			2922.6 3	100		0.0	7/2-
2960.3 3	B			2960.3 3	100		0.0	7/2-
2980.0 6	D	(23/2-)		1045.8 3	100.0	(E2)	1935.2	19/2-
2983.5 3	B			2983.5 3	100		0.0	7/2-
2993.9 3	B			1773.84 20	100		1220.07	11/2-
3022.9 3	B			1720.05 15 1804.95 10 3023.3 4	63 100 12		1302.73 1218.00 0.0	5/2- 9/2- 7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
3062.1 8	D	(23/2-)		857.9 10 1128.3 10	100 40	Q	2204.0 1935.2	(19/2-) 19/2-
3111.9 10	D			907.4 10	100		2204.0	(19/2-)
3117.6 3	B			3117.6 3	100		0.0	7/2-
3251.8 11	D			139.5 10 190.2 10	≈100 ≈100		3111.9 3062.1	(23/2-)
3254.0 4	B			2036.0 3	100		1218.00	9/2-
3263.1 3	B			1497.19 20	100		1766.17	3/2-,5/2,7/2-
3276.72 20	B			1974.15 10 2058.45 10 3277.8 7	60 100 28		1302.73 1218.00 0.0	5/2- 9/2- 7/2-
3287.6 3	B			2069.62 20	100		1218.00	9/2-
3291.6 7	D	(27/2-)		229.4 10 311.6 3	≈8.3 100	E2	3062.1 2980.0	(23/2-) (23/2-)
3347.4 10	D			367.7 10	100	D	2980.0	(23/2-)
3353.0 4	B			3353.0 4	100		0.0	7/2-
3417.1 5	B			3417.1 5	100		0.0	7/2-
3458.62 15	B			613.8 3 3458.62 15	13 100		2844.50 0.0	7/2-
3500.7 5	B			2899.5 4 3501.2 14	100 17		601.05 0.0	3/2- 7/2-
3540.6 5	B			2320.5 4	100		1220.07	11/2-
3544 4	B			2943.1 3	100		601.05	3/2-
3570.13 15	B			3570.13 15	100		0.0	7/2-
3571.69 25	B			2351.62 15	100		1220.07	11/2-
3670.6 4	B			3670.6 4	100		0.0	7/2-
3729.66 20	B			1100.4 3 3729.43 20	12 100		2629.70 0.0	7/2-
3795.43 20	B			1859.1 3 1922.1 4 3194.36 15 3795.57 20	12 11 88 100		1936.05 1873.13 601.05 0.0	(3/2-) 3/2- 7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
3800.7 3	B			3800.7 3	100		0.0	7/2-
3862.5 3	B			1832.28 20 3261.8 7 3862.8 3	40 24 100		2029.8 601.05 0.0	3/2- 7/2-
3866.2 3	B			1236.67 20 3866.1 3	30 100		2629.70 0.0	7/2-
3911.27 20	B			950.85 20 3911.27 20	18 100		2960.3 0.0	7/2-
3986.9 3	B			1357.37 15 2220.47 20 2452.51 10 2767.04 20 3987.0 3	58 74 83 100 81		2629.70 1766.17 1534.32 1220.07 0.0	3/2-,5/2,7/2- (5/2)- 11/2- 7/2-
3996.3 3	B			1366.77 20 1995.0 10 2004.5 4 2123.18 15 2693.5 3 3996.2 3	27 20 14 57 25 100		2629.70 1997.06 1991.18 1873.13 1302.73 0.0	5/2- 7/2-
4016.2 8	B			4016.2 8	100		0.0	7/2-
4025.73 25	B E			1396.03 10 1788.18 15 2491.29 15 2807.76 15	79 63 89 100		2629.70 2237.76 1534.32 1218.00	(5/2)- 9/2-
4028.92 15	B			2092.80 15 2155.64 15 4028.92 15	100 67		1936.05 1873.13 0.0	(3/2-) 7/2-
4038.96 15	B			4038.96 15	100		0.0	7/2-
4064.6 6	B			4064.6 6	100		0.0	7/2-
4083.87 15	B			4083.87 15	100		0.0	7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
4103.3 3	A B			4103.3 3	100		0.0	7/2-
4105.0 6	B			4105.0 6	100		0.0	7/2-
4129.99 15	B			4129.99 15	100		0.0	7/2-
4140.98 15	B			4140.98 15	100		0.0	7/2-
4153 4	A
4160.94 15	B			2943.1 3 4160.94 15	18 100		1218.00 0.0	9/2- 7/2-
4173.11 15	B			4173.11 15	100		0.0	7/2-
4180.8 16	A
4189.0 7	B			4189.0 7	100		0.0	7/2-
4199.1 7	A			4199.1 7	100		0.0	7/2-
4211.6 2	B			4211.6 2	100		0.0	7/2-
4260.4 4	B			4260.4 4	100		0.0	7/2-
4270.3 4	B			4270.3 4	100		0.0	7/2-
4276.53 15	B			2741.5 4 4276.53 15	19 100		1534.32 0.0	(5/2)- 7/2-
4282.6 14	A
4288.1 8	B			4288.1 8	100		0.0	7/2-
4298.3 5	A			4298.3 5	100		0.0	7/2-
4318.2 5	B			4318.2 5	100		0.0	7/2-
4332.78 15	B			4332.78 15	100		0.0	7/2-
4346.5 12	A
4350.5 6	B			4350.5 6	100		0.0	7/2-
4379.7 2	A			4379.7 2	100		0.0	7/2-
4380.2 5	A			4380.2 5	100		0.0	7/2-
4382.8 10	D	(29/2+)		1035.6 10 1090.8 10	33.33 100	D	3347.4 3291.6	(27/2-)
4399.8 8	A	(+)
4402.78 15	B			4402.78 15	100		0.0	7/2-
4420.7 10	A			4420.7 10	100		0.0	7/2-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
4424.7 6	B			4424.7 6	100		0.0	7/2-
4443.1 13	A
4477.8 3	B			4477.8 3	100		0.0	7/2-
4489.4 8	A			4489.4 8	100		0.0	7/2-
4501.9 6	B			4501.9 6	100		0.0	7/2-
4505.2 10	A
4527.2 16	A
4543.3 6	B			4543.3 6	100		0.0	7/2-
4543.6 20	A
4559.9 4	B			4559.9 4	100		0.0	7/2-
4584.6 13	A
4609.3 4	A			4609.3 4	100		0.0	7/2-
4631.1 18	A
4680.6 7	B			4680.6 7	100		0.0	7/2-
4685.8 10	B			4685.8 10	100		0.0	7/2-
4687.6 11	D	(33/2+)		304.8 10 1396.0 10	100 33.3	Q	4382.8 3291.6	(29/2+) (27/2-)
4712.7 18	A
4750.3 10	A			4750.3 10	100		0.0	7/2-
4758.0 5	B			4758.0 5	100		0.0	7/2-
4772.6 9	A
4784.7 6	B			4784.7 6	100		0.0	7/2-
4797.9 12	A	(+)
4802.5 13	B			4802.5 13	100		0.0	7/2-
4869 3	A
4880.5 3	A	(+)		4880.5 3	100		0.0	7/2-
4881.0 12	A
4899.0 9	B			4899.0 9	100		0.0	7/2-
4905.6 24	A
4956 3	A
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
4978.5 12	A	(+)
4998.8 18	A
5025.1 16	A
5080.2 13	A	(+)
5125 3	A
5132.2 20	B			5132.2 20	100		0.0	7/2-
5148.8 12	B			5148.8 12	100		0.0	7/2-
5158.2 16	A	(+)
5170.2 8	B			5170.2 8			0.0	7/2-
5179.7 20	A	(+)
5208.9 19	A	(+)
5230.3 23	A	(+)
5355 5	A	(+)
5379 5	A	(+)
5408 5	A	(+)

E(level): Correspondence between higher levels (E>1534) seen in (d,p) and other experiments is tentative. See (d,p) for these levels. See also ¹³⁶Xe(p,p),(p,p’) IAR in ¹³⁷Cs for probable analogs of some of these (d,p) levels.

J^π(level): Configurations are based on energy systematics of single-neutron states in n=83 (1990Ak01). Parity for higher energy levels is derived from allowed β decay from (7/2⁺).

J^π(level): Configuration based on HFB calculations (1990Ak01)

T_1/2(level): All ¹³⁷Xe excited levels observed in ¹³⁷I β^- decay have T_1/2|<0.4 ns (1980Fo09)

I(γ): ΔIγ is generally 10%-20%, may be smaller for well resolved lines; for very weak lines ΔIγ is about 40% (1980Fo09)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	7/2-	3.818 m 13 % β^- = 100	μ=-0.9704 10 (1990NeZY,1989Bo03), Q=-0.490 17 (1990NeZY,1989Bo03) Δ<r²>(¹³⁶Xe,¹³⁷Xe)=0.105 3 (1989Bo03). E(level): B(E2)(W.u.)>0.69. Mult is not M3 from RUL. J^π(level): Level cascade based on g.s. Levels connected by Stretch E2 γ rays.
986.20	(1/2)-		XREF: F(950).
1218.00	9/2-		J^π(level): L(d,p)=5 for 1218 and/or 1220. Both levels decay only to the 7/2- g.s. Configuration=1h9/2 expected for one (or both) of these levels.
1220.07	11/2-		E(level): B(E2)(W.u.)>0.69. Mult is not M3 from RUL. J^π(level): Level cascade based on g.s. Levels connected by Stretch E2 γ rays.
1302.73	5/2-		XREF: F(1200).
1534.32	(5/2)-		XREF: F(1410).
1621.1	15/2-		E(level): B(E2)(W.u.)>0.69. Mult is not M3 from RUL. J^π(level): Level cascade based on g.s. Levels connected by Stretch E2 γ rays.
1935.2	19/2-	10.1 ns 9	E(level): B(E2)(W.u.)>0.69. Mult is not M3 from RUL. J^π(level): Level cascade based on g.s. Levels connected by Stretch E2 γ rays.
2452.4	1/2,3/2		J^π(level): γ from 1/2⁺ n-capture state. γ only to 1/2-.
2490.38	(3/2-)		J^π(level): γ from 1/2⁺ n-capture state. γ to 7/2-.