List of levels for 162SM

Author: N. Nica | Citation: Nucl. Data Sheets 195, 1 (2024) | Cutoff date: 19-Sep-2023

2022Ki23 compiled by B. Singh (McMaster)

2017Wu04 compiled for XUNDL database by F.γ. Kondev (ANL) (including Supplemental Material table of 94 measured β-decay half-lives)

2000IcZZ, 2001AsZY, 2005Ic02 (all from same group): Produced via 15.5-MeV proton bombardment of a stack of ²³⁸U targets. Reaction products transported using a He-jet gas-flow system to an on-line isotope separator. Isotopic identification provided by observation of Eu K x-rays. Nuclide identification (first two studies). 2000IcZZ report nuclide identification but no other data, 2001AsZY report T_1/2 only, 2005Ic02 reports 3 γ’s associated with the decay and T_1/2 value.

2017Wu04: ¹⁶²Sm nuclide produced at RIBF-RIKEN facility using ⁹Be(²³⁸U,F) reaction at E=345 MeV/nucleon. Two experiments, optimized for the transmission of ¹⁵⁸Nd and ¹⁷⁰Dy ions, were carried out with average beam intensities of 7 pnA and 12 pnA, respectively. Identification of the nuclide of interest was made in the BigRIPS separator by determining the atomic number and the mass-to-charge ratio of the ion using the tof-Bρ-ΔE method. Reaction products were transported through the ZeroDegree Spectrometer and implanted into the beta-counting system WAS3ABi that was surrounded by EURICA array comprising of 84 HPGe detectors. Typical implantation rate about 100 ions/s. Measured: implanted ion-β^--t, implanted ion-β^--γ-t and implanted ions-γ-t correlations. Deduced: T_1/2.

2022Ki23: ¹⁶²Pm nuclide produced in ⁹Be(²³⁸U,F),E(²³⁸U)=345 MeV/nucleon reaction at RIBF-RIKEN. Used energy loss (ΔE), magnetic rigidity (Bρ) and time-of-flight (tof) with BigRIPS separator, multisampling ionization chambers (MUSIC), parallel-plate avalanche counters (PPACs) and plastic scintillators for separating fission fragments. Radioactive ions implanted in Advanced Implantation Detector Array (AIDA) (a stack of six double-sided silicon strip detectors (DSSSDs)), centered in the BRIKEN neutron detector (140 ³He-filled proportional counters embedded in large polyethylene moderator matrix). Measured γ, nγ-coin, (implanted ions)(β^-) correlations, and (implanted ions)(β^-)(neutron) correlations. Deduced T_1/2

Unless mentioned otherwise all data are from ¹⁶²Sm IT decay dataset

Q-value: S(2n)=10289 4, S(2p)=22230 50, Q(β^-n)=-659 11 (2021Wa16)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
71.4	(2+)		71.4 4	[E2]	8.21	α=8.21 21, α(K)=2.71 5, α(L)=4.26 13, α(M)=0.992 30, α(N)=0.217 7, α(O)=0.0269 8, α(P)=0.0001145 22
235.9	(4+)		164.5 3	[E2]	0.405	α=0.405 6, α(K)=0.274 4, α(L)=0.1016 16, α(M)=0.0232 4, α(N)=0.00511 8, α(O)=0.000668 11, α(P)=1.299×10^-5 19
1010.7	(4-)	1.78 µs 7	774.8 3	[E1]	1.69×10^-3	B(E1)(W.u.)=2.74E-10 11, α=1.69E-3 2, α(K)=0.001453 20, α(L)=0.0001888 26, α(M)=4.01E-5 6, α(N)=9.07E-6 13, α(O)=1.355E-6 19, α(P)=8.37E-8 12

Q(β-)=4344 keV 4	S(n)= 5778 keV 8	S(p)= 11581 keV 10	Q(α)= -2969 keV 4
Reference: 2021WA16

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A	0+	3.15 s +26-30 % β^- = 100
71.4 4	A	(2+)		71.4 4	100	[E2]	0.0	0+
235.9 5	A	(4+)		164.5 3	100	[E2]	71.4	(2+)
1010.7 6	A	(4-)	1.78 µs 7	774.8 3	100	[E1]	235.9	(4+)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	0+	3.15 s +26-30 % β^- = 100	E(level): K^π=0⁺, g.s. band.
71.4	(2+)		E(level): K^π=0⁺, g.s. band.
235.9	(4+)		E(level): K^π=0⁺, g.s. band.
1010.7	(4-)	1.78 µs 7	Proposed configuration=ν7/2[633]~#ν1/2[521], Kπ=4- from comparison with deformed Hartree-Fock with angular momentum projection model, and projection shell model (2017Yo01; same configuration proposed by 2017Pa25). E(level): K^π=(4-), 2-qp state (2017Pa25).