List of levels for 135CS

Authors: Balraj Singh, Alexander A. Rodionov and Yuri L. Khazov | Citation: Nucl. Data Sheets 109, 517 (2008) | Cutoff date: 22-Jan-2008

Isotope shift measurements: 1986Bo45, 1986Ba59, 1978Ge15, 1975Ul02, 1967Hu01

Mass measurements: 1999Am05 (penning trap), 1990St25, 1982Au01

Nuclear structure calculations: 2005Si05 and 2000Pa61 (charge radii, isotope shifts), 1977Ok04 (low-lying collective states), 1971Ch12 and 1969Fr17 (levels, transition rates, magnetic moment, Q, unified model)

¹²⁸Te(¹⁴N,n2pα) E=64-90 MeV: 2005Un01: measured excitation functions

Q-value: Note: Current evaluation has used the following Q record 268.7 11 8762.0 10 6746.3 13-2562.4 15 2003Au03

E(level): From least-squares fit to Eγ’s. Seven neutron resonances at E(n)= 0.01225, 0.03915, 0.05720, 0.1068, 0.1533, 0.170 and 0.263 keV are listed in the dataset: ¹³⁴Cs(n,γ):resonances

E(γ): From ¹³⁴Cs(n,γ), except as noted

I(γ): Relative photon branchings from ¹³⁵Xe β^- decay (9.14 h), unless otherwise stated

M(γ): From ce data in ¹³⁵Xe β^- decay (9.14 h), unless otherwise stated

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Mixing Ratio	Conversion Coefficient	Additional Data
249.767	5/2+	0.28 ns 8	249.770 4	M1(+E2)	1.0 LT	0.0738	B(E2)(W.u.)=23 7, B(M1)(W.u.)=0.0023 7, α=0.0738 21, α(K)=0.0623 10, α(L)=0.0091 11, α(M)=0.00188 23, α(N)=0.00039 5, α(O)=5.3E-5 5, α(P)=2.34E-6 9, α(N+)=0.00045 5
608.153	5/2+		358.384 9	M1,E2		0.0265	α=0.0265 17, α(K)=0.0224 18, α(L)=0.00325 15, α(M)=0.00067 4, α(N)=0.000141 7, α(O)=1.90×10^-5 4, α(P)=8.3E-7 11, α(N+)=0.000160 7
608.153	5/2+		608.151 12	M1(+E2)	0.5 LT	0.00730	α=0.00730 22, α(K)=0.00629 20, α(L)=0.000803 19, α(M)=0.000164 4, α(N)=3.47×10^-5 9, α(O)=4.84E-6 13, α(P)=2.41E-7 9, α(N+)=3.97E-5 10
786.838	11/2+		786.836 13	E2		0.00295	α=0.00295, α(K)=0.00252 4, α(L)=0.000339 5, α(M)=6.93×10^-5 10, α(N)=1.458E-5 21, α(O)=2.00E-6 3, α(P)=9.29E-8 13, α(N+)=1.668E-5 24
1632.9	19/2-	53 m 2 % IT = 100	846.1	M4		0.0421	B(M4)(W.u.)=0.0158 7, α=0.0421, α(K)=0.0350 5, α(L)=0.00565 8, α(M)=0.001185 17, α(N)=0.000250 4, α(O)=3.42×10^-5 5, α(P)=1.558E-6 22, α(N+)=0.000286 4

Q(β-)=268.9 keV 11	S(n)= 8762.0 keV 10	S(p)= 6746.5 keV 13	Q(α)= -2563.9 keV 12
Reference: 2012WA38

References:
A	¹³⁵Xe β^- decay (9.14 H)	B	¹³⁵Xe β^- decay (15.29 M)
C	¹³⁵Cs IT decay (53 M)	D	¹³⁴Cs(n,γ) E=TH
E	¹³⁸Ba(μ^-,3nγ)

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	7/2+	2.3×10⁺⁶ y 3 % β^- = 100
249.767 4	A D E	5/2+	0.28 ns 8	249.770 4	100	M1(+E2)	0.0	7/2+
408.026 5	A D			158.260 4 408.009 8	81 3 100 3		249.767 0.0	5/2+ 7/2+
608.153 8	A D	5/2+		200.19 10 358.384 9 608.151 12	0.40 16 7.6 3 100 3	M1,E2 M1(+E2)	408.026 249.767 0.0	5/2+ 7/2+
786.838 13	B C D	11/2+		786.836 13	100	E2	0.0	7/2+
981.396 19	A D			373.13 10 573.36 4 731.634 21	28 5 8.7 13 100 5		608.153 408.026 249.767	5/2+ 5/2+
1062.385 13	A D			454.2 2 654.296 23 812.635 22 1062.41 2	5.1 10 64 3 100 3 5.8 12		608.153 408.026 249.767 0.0	5/2+ 5/2+ 7/2+
1133?	B			1133?	100		0.0	7/2+
1192?	B			1192.2?	100		0.0	7/2+
1358?	B			1358?	100		0.0	7/2+
1632.9	C	19/2-	53 m 2 % IT = 100	846.1	100	M4	786.838	11/2+

E(level)	E(gamma)	Comments
608.153	200.19	E(γ): From ¹³⁵Xe β^- decay (9.14 h)
786.838	786.836	M(γ): from ¹³⁵Cs IT decay
981.396	373.13	E(γ): From ¹³⁵Xe β^- decay (9.14 h)
1062.385	454.2	E(γ): From ¹³⁵Xe β^- decay (9.14 h)
1062.385	1062.41	E(γ): From ¹³⁵Xe β^- decay (9.14 h)
1133	1133	E(γ): From ¹³⁵Xe β^- decay (15.29 min) I(γ): From ¹³⁵Xe β^- decay (15.29 min)
1192	1192.2	E(γ): From ¹³⁵Xe β^- decay (15.29 min) I(γ): From ¹³⁵Xe β^- decay (15.29 min)
1358	1358	E(γ): From ¹³⁵Xe β^- decay (15.29 min) I(γ): From ¹³⁵Xe β^- decay (15.29 min)