Nuclear Data Sheets Update for A = 96

doi:10.1006/ndsh.1993.1006

Nuclear Data Sheets

Volume 68, Issue 1, January 1993, Pages 165-270

https://doi.org/10.1006/ndsh.1993.1006 Get rights and content

Abstract

The experimental nuclear structure data available through October 1991 have been reviewed. A summary of information obtained in various reaction and decay experiments is presented, together with adopted level schemes.

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Nuclear Data Sheets for A = 96
2008, Nuclear Data Sheets
Experimental data on ground- and excited-state properties for all known nuclei with mass number A = 96 have been compiled and evaluated. States populated in radioactive decay, as well as in nuclear reactions, have been considered. For these nuclei, level and decay schemes, as well as tables of nuclear properties, are presented. This work supersedes the 1993 evaluation by L.K. Peker (1993Pe02). In summary, three isomers were identified in ⁹⁶Ag (2003Ba39,1997Gr02), even though the relative energies were not established. In ⁹⁶Ru a nuclear fluorescence experiment (2005Li59) determined the spin, branching ratios and transition strengths of dipole excitations; high-spin level properties were reported by 2000Kh02 and 2002Kl07. High spin levels in ⁹⁶Tc were studied in 2001Bu19. For ⁹⁶Mo, there are new high-spin data (2000Ch42), as well as low-spin levels produced in ( $n, n^{'} γ$ ) (2007Le05) and ( $γ, γ^{'}$ ) (2004Fr30). High spin data (2005Pa48) were obtained for ⁹⁶Zr using heavy-ion induced fission. For ⁹⁶Sr, new levels were deduced using alpha-induced (2005Pa48) and spontaneous fission. The decay of a (10-) isomer in ⁹⁶Rb was studied by 2005Pi13. Several new mass measurements for neutron rich nuclides have been published, which were used to obtain Q-values and separation energies.
Study of the low-lying collective states in 94-100Mo isotopes using the MAVA
2006, Nuclear Physics A
A systematic investigation of reduced electric quadrupole decay strengths, $B (E 2)$ and level energies of even ^94–100Mo isotopes is performed using the microscopic anharmonic vibrator approach (MAVA). The MAVA is suited for dynamical microscopic description of two-phonon-like states and their energy splitting due to interaction with low-lying one-phonon states. The starting point for the model is a realistic single-particle valence space and a microscopic many-body Hamiltonian which is used to generate the one-phonon states by the use of the quasiparticle random-phase approximation (QRPA). The same Hamiltonian generates also the interaction between the one- and two-phonon states. Comparison of the calculated energies and $B (E 2)$ values with the available data suggests that ^94–100Mo are closer to anharmonic vibrators than deformed rotors.
Excitation functions of residues in the interaction of 12C with 103Rh up to an incident energy of 400 MeV
2005, Nuclear Physics A
The excitation functions for production of 45 residues in the interaction of ¹²C with ¹⁰³Rh at incident energies ranging from about 40 to 400 MeV are analysed in terms of many competing reaction mechanisms including complete and incomplete fusion reactions and the quite relevant contribution of the decay of the target nucleus excited in the inelastic scattering of the incident ¹²C ions. The cross-sections of most of these mechanisms have been obtained by extrapolation from the values measured in the interaction of ¹²C with the neighbouring nucleus ⁹³Nb. The agreement between experimental data and model predictions is very good in most cases.
Electric monopole transitions between 0+ states for nuclei throughout the periodic table
2005, Atomic Data and Nuclear Data Tables
Adopted spectroscopic information on $0_{i}^{+} \to 0_{f}^{+}$ pure E0 transitions has been deduced by critical evaluation of the available experimental data for all even–even nuclei ranging from $^{4}_{2} {He}_{2}$ to $^{250}_{98} {Cf}_{152}$ . Values of $q_{K}^{2} (E 0 / E 2)$ , the ratio of the K-conversion electron intensity of the $0_{i}^{+} \to 0_{f}^{+}$ , E0 transition to that of the $0_{i}^{+} \to 2_{1}^{+}$ , E2 transition, have been determined. This procedure, together with the most recent theoretical coefficients for internal conversion and electron–positron pair creation, as well as electronic factors, produced a large number of new X(E0/E2) values, defined as the dimensionless ratio of the absolute B(E0) and B(E2) transition rates. The squared value of the monopole transition strength, ρ²(E0), has been deduced using the best available 0⁺-level half-lives and branching ratios.
Isomerism in 96Ag and non-yrast levels in 96Pd and 95Rh, studied in β decay
2003, Nuclear Physics A
The β decay of ⁹⁶Ag (Z=47,N=49) was investigated by measuring positrons, X rays as well as β-delayed protons and γ rays. The γ radiation was studied by means of germanium detectors and a NaI total-absorption spectrometer. Two β-decaying isomers in ⁹⁶Ag were established with half-lives of 4.40(6) and 6.9(6) s and tentative spin–parity assignments of (8⁺) and (2⁺), respectively. For both isomers, the intensities of β transitions to low-lying levels of ⁹⁶Pd (Z=46,N=50) and β-delayed proton decays to levels in ⁹⁵Rh (Z=45,N=50) were measured. Several new ⁹⁶Pd levels were firmly established. The level energies, their γ decays and the Gamow–Teller decay of ⁹⁶Ag are compared to shell-model predictions. A new low-lying level in ⁹⁵Rh was found at 680 keV excitation energy. Through a comparison with low-lying states of N=50 isotones, this level is interpreted as the first excited 7/2⁺ state built on the proton 9/2⁺ ground state. The assignments of further excited states in ⁹⁵Rh are discussed.
Reduced electric-octupole transition probabilities, B(E3;0<inf>1</inf>+ → 3<inf>1</inf>-) - An update
2002, Atomic Data and Nuclear Data Tables
A previous compilation of excitation energies E_x (3₁⁻) and reduced electric-octupole transition probabilities B(E3;0₁⁺→3₁⁻) for first 3⁻ states of even-even nuclides, which covered the literature to March 1988, has been updated to cover the literature to the end of 2000. Data obtained from various experimental procedures are tabulated. The final table presents adopted values of B(E3;0₁⁺→3₁⁻), together with the E3 transition strengths |M(E3)|² in Weisskopf units. Plots of |M(E3)|² versus mass number A, atomic number Z, and neutron number N confirm the existence of structure suggested in the earlier work.

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Nuclear Data Sheets

Abstract

References (0)

Cited by (38)

Nuclear Data Sheets for A = 96

Study of the low-lying collective states in <sup>94-100</sup>Mo isotopes using the MAVA

Excitation functions of residues in the interaction of <sup>12</sup>C with <sup>103</sup>Rh up to an incident energy of 400 MeV

Electric monopole transitions between 0<sup>+</sup> states for nuclei throughout the periodic table

Isomerism in <sup>96</sup>Ag and non-yrast levels in <sup>96</sup>Pd and <sup>95</sup>Rh, studied in β decay

Reduced electric-octupole transition probabilities, B(E3;0<inf>1</inf><sup>+</sup> → 3<inf>1</inf><sup>-</sup>) - An update

Revised A-ChainsNuclear Data Sheets Update for A = 96

Abstract

Revised A-Chains
Nuclear Data Sheets Update for A = 96