List of levels for 98SR

Authors: Jun Chen, Balraj Singh | Citation: Nucl. Data Sheets 164, 1 (2020) | Cutoff date: 15-Feb-2020

Other measurements:

2009Ma47: ²³⁸U(¹³⁶Xe,Xγ): E=954 MeV ¹³⁶Xe beam from the PIAVE-ALPI complex at INFN. Measured Eγ, Iγ, γγ-coin with the CLARA array and reaction products with the PRISMA spectrometer. Report 145γ, 289γ and 433γ.

Mass measurements: 2016Kl04, 2012Si10 (Penning-trap mass spectrometer TITAN at ISAC-TRIUMF facility), 2006Ha03 (Penning trap spectrometer at Jyvaskyla facility)

Hyperfine structure studies for the g.s.: 1990Bu12, 1988Si06

Measurements of rms charge radii: 1996Li25, 1992Ne09

Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for 52 primary references, 43 dealing with nuclear structure calculations and 9 with decay modes and half-lives.

Q-value: S(2n)=9642 9, S(2p)=27921 21, Q(β^-n)=1627 7 (2017Wa10)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Mixing Ratio	Conversion Coefficient	Additional Data
144.70	2+	2.78 ns 8	144.70 5	E2		0.262	B(E2)(W.u.)=96 3, α=0.262, α(K)=0.225 4, α(L)=0.0313 5, α(M)=0.00527 8, α(N)=0.000623 9, α(O)=2.99E-5 5
215.64	0+	22.9 ns 17	71.0 1	E2		3.55	B(E2)(W.u.)=62 +7-6, α=3.55, α(K)=2.86 5, α(L)=0.579 9, α(M)=0.0979 15, α(N)=0.01098 17, α(O)=0.000348 6
434.07	4+	82 ps 6	289.40 5	E2		0.0218	B(E2)(W.u.)=124 +10-9, α=0.0218, α(K)=0.0191 3, α(L)=0.00230 4, α(M)=0.000385 6, α(N)=4.71E-5 7, α(O)=2.70E-6 4
867.37	6+	7.86 ps 24	433.30 5	E2		0.0057	B(E2)(W.u.)=174.8 18, α=0.0057
871.34	(2+)	8.6 ps 14	437.7	[E2]		0.0055	B(E2)(W.u.)<12, α=0.0055
	(2+)	8.6 ps 14	655.8 2	[E2]		0.00168	B(E2)(W.u.)=13 +5-4, α=0.00168
	(2+)	8.6 ps 14	726.7 3	[M1+E2]	0.7 10	0.00117	B(E2)(W.u.)=0.6 +15-6, B(M1)(W.u.)=0.0007 +9-5, α=0.00117 7
	(2+)	8.6 ps 14	871.2 3	[E2]			B(E2)(W.u.)=0.8 +5-3
1433.65	8+	2.97 ps 48	566.3 1	E2		0.00255	B(E2)(W.u.)=122 +25-18, α=0.00255
1600.69	(2+)		1455.9 3	Q(+D)	+1.5 GT
2123.15	10+	1.07 ps 17	689.5 2	E2		0.00147	B(E2)(W.u.)=126 +25-18, α=0.00147
2534.3	(6+)	4.5 ns 10	2100.2	[E2]			B(E2)(W.u.)=0.00010 +4-3
2927.7	(12+)	0.46 ps 7	804.5 3	[E2]			B(E2)(W.u.)=135 +25-19
3442.7	(3)		3008.6 4	D+Q	-1.8 12

Q(β-)=5872 keV 9	S(n)= 5913 keV 5	S(p)= 15193 keV 4	Q(α)= -7500 keV 13
Reference: 2017WA10

References:
A	⁹⁸Rb β^- decay (115 MS)	B	⁹⁸Rb β^- decay (96 MS)
C	⁹⁹Rb β^-n decay (57.8 MS)	D	¹⁰⁰Rb β^-2n decay (52 MS)
E	²⁴⁸Cm SF decay	F	²⁵²Cf SF decay
G	⁷Li(⁹⁸Rb,α3nγ)	H	²³⁵U(n,Fγ)
I	Coulomb Excitation

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	0+	0.653 s 2 % β^- = 100 % β^-n = 0.23 3
144.70 5	A B C D E F G H I	2+	2.78 ns 8	144.70 5	100	E2	0.0	0+
215.64 10	A B C E F I	0+	22.9 ns 17	71.0 1 215.6	100	E2 E0	144.70 0.0	2+ 0+
434.07 7	B C E F G H I	4+	82 ps 6	289.40 5	100	E2	144.70	2+
867.37 9	B E F G H I	6+	7.86 ps 24	433.30 5	100	E2	434.07	4+
871.34 12	A B C E F I	(2+)	8.6 ps 14	437.7S 655.8 2 726.7 3 871.2 3	<9 100 10 23 4 25 4	[E2] [E2] [M1+E2] [E2]	434.07 215.64 144.70 0.0	4+ 0+ 2+ 0+
1224.4 3	A C	(0+,1)		1079.7 3	100		144.70	2+
1433.65 13	E F H I	8+	2.97 ps 48	566.3 1	100	E2	867.37	6+
1539.42 16	A B	(2+)		668.1 3 1105.5 3 1323.9 3 1539.2 4	55 10 85 15 100 20 40 15		871.34 434.07 215.64 0.0	(2+) 4+ 0+ 0+
1600.69 14	A B	(2+)		1167.1 4 1455.9 3 1600.4 3 ?	7 3 100 7 25 13	Q(+D)	434.07 144.70 0.0	4+ 2+ 0+
1681.45 18	B E	(4+)		810.4 4 1247.3 2 1537.0 5 ?	100 50 70 30 50 30		871.34 434.07 144.70	(2+) 4+ 2+
1745.3 4 ?	A B			1600.6 4 ?	100		144.70	2+
1837.94 15	A B E F	(3+)	7.5 ns 15	1403.9 4 1693.2 2	4.2 13 100 8		434.07 144.70	4+ 2+
1922.4 4 ?	A B			1777.7 4 ?	100		144.70	2+
1964.16 20	A B	(1,2+)		1092.8 3 1819.5 3 1964.1 4 ?	45 7 100 9 55 14		871.34 144.70 0.0	(2+) 2+ 0+
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1978.53 17	B E F	(4+)		140.6 1 1111.0 1544.4	100 4 <1 32 7		1837.94 867.37 434.07	(3+) 6+ 4+
2043.1 10	E			1609			434.07	4+
2123.15 24	E F I	10+	1.07 ps 17	689.5 2	100	E2	1433.65	8+
2124.23 13	A B	(1+:4+)		286.2 2 523.4 3 585.0 3 1253.2 4 1979.6 3	42 8 42 17 33 17 58 17 100 25		1837.94 1600.69 1539.42 871.34 144.70	(3+) (2+) (2+) (2+) 2+
2153.61 25	B E F	(5+)		175.1 2 315.7 1286.1 1719.5	59 3 51 3 5 5 100 34		1978.53 1837.94 867.37 434.07	(4+) (3+) 6+ 4+
2182.1 15	E			139			2043.1
2206.09 20	B	(3)		605.4 2 1772.0 3	34 6 100 14	D+Q	1600.69 434.07	(2+) 4+
2231.38 14	B	(2,3,4+)		107.2 1 630.7 2 1359.8 3 2086.3 4	70 7 100 10 100 17 33 10		2124.23 1600.69 871.34 144.70	(1+:4+) (2+) (2+) 2+
2237.6 4 ?	A B			2092.9 4 ?	100		144.70	2+
2289.2 3 ?	A B			2144.5 3 ?	100		144.70	2+
2316.14 21	A B	(2+)		192.1 4 ? 2171.5 3 2315.8 4 ?	6 4 100 13 47 19	D+Q	2124.23 144.70 0.0	(1+:4+) 2+ 0+
2359.14 24	B	(2+,3,4+)		234.2 4 1925.5 4 2214.7 4	44 22 100 17 44 11		2124.23 434.07 144.70	(1+:4+) 4+ 2+
2361.1 6	E F	(6+)		207.8 382.9 1493?	100 7 60 7		2153.61 1978.53 867.37	(5+) (4+) 6+
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2432.23 15	E	(6+)		751.0 5 ? 1564.7 2 1998.2 2	23 14 100 18 55 14		1681.45 867.37 434.07	(4+) 6+ 4+
2534.3 6	E F	(6+)	4.5 ns 10	1666.8 2100.2	15 6 100 19	[E2]	867.37 434.07	6+ 4+
2574.8 8	E			143 1707			2432.23 867.37	(6+) 6+
2602.7 8	E F	(7+)		241.5 449.3	100 11 39 7		2361.1 2153.61	(6+) (5+)
2771.9 6	E F	(7+)		237.6 1338.5 1904.4	28 5 6 6 100 12		2534.3 1433.65 867.37	(6+) 8+ 6+
2804.4 3	A B	(1,2+)		2659.8 4 ? 2804.2 4 ?	71 14 100 24		144.70 0.0	2+ 0+
2818.27 18	E	(7+)		385.9 3 1384.7 2 1950.8 3	55 27 82 27 100 27		2432.23 1433.65 867.37	(6+) 8+ 6+
2873.5 9	E F	(8+)		270.8 512.3	100 8 77 8		2602.7 2361.1	(7+) (6+)
2899.5 10	E			365			2534.3	(6+)
2927.7 4	E F	(12+)	0.46 ps 7	804.5 3	100	[E2]	2123.15	10+
2932.3 4	B	(2+,3,4)		2498.2 4	100		434.07	4+
3041.4 7	E F	(8+)		269.3 918.2 1607.8	25 8 100 19 <2		2771.9 2123.15 1433.65	(7+) 10+ 8+
3162.7 10	E			263 391			2899.5 2771.9	(7+)
3174.6 10	E F	(9+)		301.1 571.9	76 12 100 20		2873.5 2602.7	(8+) (7+)
3290.5 4	A B	(1,2+)		3145.9 5 3290.2 6 ?	58 11 100 39		144.70 0.0	2+ 0+
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
3341.4 12	E F	(9+)		300.0	100		3041.4	(8+)
3442.7 4	B	(3)		3008.6 4	100	D+Q	434.07	4+
3445.7 14	E			283			3162.7
3462.7 4	B	(2+:4)		3028.6 4	100		434.07	4+
3510.7 11	F	(10+)		336.1 637.2	100 23 100 31		3174.6 2873.5	(9+) (8+)
3622.7 5	A B	(1,2+)		3478.1 6 3622.4 7 ?	65 18 100 41		144.70 0.0	2+ 0+
3671.0 16	E F	(10+)		329.6	100		3341.4	(9+)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - g.s. band
0.0	0+	0.653 s 2 % β^- = 100 % β^-n = 0.23 3
144.70 5	2+	2.78 ns 8	144.70 5	100	E2	0.0	0+
434.07 7	4+	82 ps 6	289.40 5	100	E2	144.70	2+
867.37 9	6+	7.86 ps 24	433.30 5	100	E2	434.07	4+
1433.65 13	8+	2.97 ps 48	566.3 1	100	E2	867.37	6+
2123.15 24	10+	1.07 ps 17	689.5 2	100	E2	1433.65	8+
2927.7 4	(12+)	0.46 ps 7	804.5 3	100	[E2]	2123.15	10+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - Band based on 215.4, 0⁺.
215.64 10	0+	22.9 ns 17
871.34 12	(2+)	8.6 ps 14	437.7S 655.8 2 726.7 3 871.2 3	<9 100 10 23 4 25 4	[E2] [E2] [M1+E2] [E2]	434.07 215.64 144.70 0.0	4+ 0+ 2+ 0+
1681.45 18	(4+)		810.4 4 1247.3 2 1537.0 5 ?	100 50 70 30 50 30		871.34 434.07 144.70	(2+) 4+ 2+
2432.23 15	(6+)		751.0 5 ? 1564.7 2 1998.2 2	23 14 100 18 55 14		1681.45 867.37 434.07	(4+) 6+ 4+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - ν9/2[404]-3/2[411],Kπ=(3⁺)
1837.94 15	(3+)	7.5 ns 15
1978.53 17	(4+)		140.6 1 1111.0 1544.4	100 4 <1 32 7		1837.94 867.37 434.07	(3+) 6+ 4+
2153.61 25	(5+)		175.1 2 315.7 1286.1 1719.5	59 3 51 3 5 5 100 34		1978.53 1837.94 867.37 434.07	(4+) (3+) 6+ 4+
2361.1 6	(6+)		207.8 382.9 1493?	100 7 60 7		2153.61 1978.53 867.37	(5+) (4+) 6+
2602.7 8	(7+)		241.5 449.3	100 11 39 7		2361.1 2153.61	(6+) (5+)
2873.5 9	(8+)		270.8 512.3	100 8 77 8		2602.7 2361.1	(7+) (6+)
3174.6 10	(9+)		301.1 571.9	76 12 100 20		2873.5 2602.7	(8+) (7+)
3510.7 11	(10+)		336.1 637.2	100 23 100 31		3174.6 2873.5	(9+) (8+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - ν9/2[404]+3/2[411],Kπ=(6⁺)
2534.3 6	(6+)	4.5 ns 10
2771.9 6	(7+)		237.6 1338.5 1904.4	28 5 6 6 100 12		2534.3 1433.65 867.37	(6+) 8+ 6+
3041.4 7	(8+)		269.3 918.2 1607.8	25 8 100 19 <2		2771.9 2123.15 1433.65	(7+) 10+ 8+
3341.4 12	(9+)		300.0	100		3041.4	(8+)
3671.0 16	(10+)		329.6	100		3341.4	(9+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 5 - γ cascade
2899.5 10
3162.7 10			263 391			2899.5 2771.9	(7+)
3445.7 14			283			3162.7

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	0+	0.653 s 2 % β^- = 100 % β^-n = 0.23 3	Δ<r²>(⁹⁷Sr-⁹⁸Sr)=0.578 fm² 9 (1996Li25). E(level): g.s. band.
144.70	2+	2.78 ns 8	μ=0.76 14 (1989Wo05,2014StZZ), Q=-0.52 24 (2016Cl01) E(level): g.s. band.
215.64	0+	22.9 ns 17	E(level): Band based on 215.4, 0⁺.
434.07	4+	82 ps 6	Q=-1.87 +14-25 (2016Cl01) E(level): g.s. band.
867.37	6+	7.86 ps 24	Q=-1.21 +39-16 (2016Cl01) E(level): g.s. band.
871.34	(2+)	8.6 ps 14	Q=+0.02 +13-12 (2016Cl01) E(level): Band based on 215.4, 0⁺.
1433.65	8+	2.97 ps 48	Q=-0.95 +74-88 (2016Cl01) E(level): g.s. band.
1681.45	(4+)		E(level): Band based on 215.4, 0⁺.
1837.94	(3+)	7.5 ns 15	E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
1978.53	(4+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
2123.15	10+	1.07 ps 17	E(level): g.s. band.
2153.61	(5+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
2361.1	(6+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
2432.23	(6+)		E(level): Band based on 215.4, 0⁺.
2534.3	(6+)	4.5 ns 10	E(level): ν9/2[404]+3/2[411],Kπ=(6⁺).
2602.7	(7+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
2771.9	(7+)		E(level): ν9/2[404]+3/2[411],Kπ=(6⁺).
2873.5	(8+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
2927.7	(12+)	0.46 ps 7	E(level): g.s. band.
3041.4	(8+)		E(level): ν9/2[404]+3/2[411],Kπ=(6⁺).
3174.6	(9+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
3341.4	(9+)		E(level): ν9/2[404]+3/2[411],Kπ=(6⁺).
3510.7	(10+)		E(level): ν9/2[404]-3/2[411],Kπ=(3⁺).
3671.0	(10+)		E(level): ν9/2[404]+3/2[411],Kπ=(6⁺).

E(level)	E(gamma)	Comments
144.70	144.70	E(γ): from ²⁴⁸Cm SF decay (2019Ur01). Others: 144.5 1 (2002Lh01), 144.4 2 (1977Wo07), 144.2 (1987Ma58), 144.5 (1984Be50), 144.7 (1979Pe17), 144.6 (1980Sc13), 144.224 6 (1979Bo26, curved crystal) from ⁹⁸Rb decay (96 ms); 144.6 3 (1982Kr11, ¹⁰⁰Rb β^-2n decay); 144.9 (2004Li66) and 144.3 (1997Ha64) from ²⁵²Cf SF decay. Value from 197Bo26 is the most precise but seemingly discrepant, in view of higher values by ≈0.4-0.5 keV in other studies.
215.64	215.6	E(γ): from level energy difference
434.07	289.40	E(γ): from ²⁴⁸Cm SF decay (2019Ur01). Others: 289.3 1 (2002Lh01) 289.2 2 (1977Wo07) in ⁹⁸Rb decay (96 ms) are in agreement.
867.37	433.30	E(γ): from ²⁴⁸Cm SF decay (2019Ur01). M(γ): γγ(θ) in ²⁵²Cf SF decay (2019Ur01) (see data in ²⁴⁸Cm SF), and RUL
871.34	437.7	E(γ): from level-energy difference. This transition is considered in GOSIA analysis by 2016Cl01 I(γ): deduced from B(E2) values in Coulomb excitation (by evaluators).
	726.7	E(γ): from ²⁴⁸Cm SF decay
	871.2	E(γ): average of values from ²⁴⁸Cm SF decay and ⁹⁸Rb decay (96 ms)
1433.65	566.3	M(γ): γγ(θ) in ²⁵²Cf SF decay (2019Ur01) (see data in ²⁴⁸Cm SF), and RUL
1837.94	1403.9	I(γ): weighted average of 3.9 13 from ⁹⁸Rb β^- decay (96 ms) and 6 3 from ²⁵²Cf SF decay
1837.94	1693.2	I(γ): from ⁹⁸Rb β^- decay (96 ms) and from ²⁵²Cf SF decay
2043.1	1609	E(γ): from ²⁴⁸Cm SF decay only
2123.15	689.5	E(γ): from ²⁴⁸Cm SF decay M(γ): γγ(θ) in ²⁵²Cf SF decay (2019Ur01) (see data in ²⁴⁸Cm SF), and RUL
2182.1	139	E(γ): from ²⁴⁸Cm SF decay only
2361.1	1493	E(γ): from ²⁴⁸Cm SF decay only
2927.7	804.5	E(γ): from ²⁴⁸Cf SF decay (2019Ur01). Others: 812.5 (1996Sm04), 810.0 (2001Ur01) in ²⁴⁸Cm SF decay; 805.6 (2004Li66) in ²⁵²Cf SF decay. The spread in the available Eγ values make the precise energy of this transition uncertain. This may be the reason 2019Ur01, in Fig. 2 of their paper place Eγ value and the corresponding level energy in parentheses.
3174.6	301.1	E(γ): 304 in ²⁴⁸Cm SF decay (2004Du10)
3174.6	571.9	E(γ): 576 in ²⁴⁸Cm SF decay (2004Du10)