Nuclear data sheets for A = 83

The 1975 version of Nuclear Data Sheets for A=83 has been revised. Detailed level and decay schemes, arguments for Jπ assignments, and experimental data are presented.     

Nuclear data sheets for A = 201

Experimental data pertaining to nuclei with A=201 are compiled and evaluated.     

Nuclear data sheets for A = 100

The 1960 version of the Nuclear Data Sheets for A = 100 has been revised on the basis of experimental data received prior to December 1, 1973. Information from approximately 100 papers and communications has been included in the present evaluation.Data on nine A = 100 nuclei are presented. The assignment of a 7.1-s activity to the decay of the ¹⁰⁰Zr ground state and the assignment of 1.5-s and 3.1-s activities to the decay of ¹⁰⁰Nb isomers adopted by the compilers differ from assignments proposed in the published literature. The decay scheme for ¹⁰⁰Zr is not known, and the separate decay schemes for the two ¹⁰⁰Nb isomers have not yet been determined. Many spin assignments have been made for the stable nuclei ¹⁰⁰Mo and ¹⁰⁰Ru. The decay scheme for ¹⁰⁰Tc is well established, but no excited levels in this nucleus are known. The decay of ¹⁰⁰Rh has been extensively studied. From an evaluation of all data, the compilers propose decay branching ratios to low-lying levels in ¹⁰⁰Ru which differ somewhat from those given in the literature. The spins of a few low-lying lying levels in ¹⁰⁰Rh are known. Details of the ¹⁰⁰Pd decay scheme are uncertain since the decay energy and the decay branching ratio to the ¹⁰⁰Rh ground state have not been measured and relative photon intensities for some transitions in the decay are not accurately known. The first level scheme for ¹⁰⁰Pd, which has recently been proposed, is presented. The assignment of a 2.3-m activity to ¹⁰⁰Ag decay appears well established, but the compilers regard the assignment of an 8-m activity to ¹⁰⁰Ag decay as uncertain. The half-life of the ¹⁰⁰Cd ground state has been measured, but no decay scheme has been proposed.     

Nuclear data sheets for A = 129

The literature pertaining to nuclei in the A = 129 mass chain has been examined and the experimental data summarized in the present compilation. A minimum of numerical data is included.     

Nuclear data sheets for A = 92

Nuclear structure data pertaining to nuclei with A = 92 have been compiled and evaluated, updating the 1972 Nuclear Data Sheets. Adopted level properties and decay schemes are presented.     

Nuclear data sheets for A = 91

The 1972 version of Nuclear Data Sheets for A = 91 has been revised. Detailed level and decay schemes, arguments for J_π assignments, and experimental data are presented.     

Nuclear data sheets for A = 181

The available nuclear structure information for all nuclei with mass number A = 181 is presented. Experimental data and their evaluation; comparison with theory, where possible; and arguments for spin, parity, and Nilsson-state assignments are given. Inconsistencies and discrepancies are indicated.     

Nuclear data sheets for A = 191

Level schemes, spin and parity assignments, and decay properties are presented for all nuclei with mass number A = 191. Experimental data and adopted values are given along with conclusions as to the spin and parity assignments. The presentation of the nuclear properties is given in the light of the data and current theoretical ideas. In this transition region, level decay rates are seen to be of particular importance and so have been summarized in terms of multipole enhancement or hindrance. The compilers have attempted to bring out some inconsistencies in the data and resolve discrepancies when possible. Deficiencies in the data include (a) reaction data leading to ¹⁹¹Pt, (b) rigorous spin assignments for ¹⁹¹Pt, and (c) determination of the ground-state properties of ¹⁹¹Hg. An abundance of data on stable ¹⁹¹Ir shows that nuclear deformations are already a prominent characteristic in this transitional nucleus.     

Nuclear data sheets for A = 81

The 1975 version of Nuclear Data Sheets for A=81 has been revised. Detailed level and decay schemes, arguments for Jπ assignments, and experimental data are presented.     

Nuclear data sheets for A = 205

The available experimental data pertaining to the nuclear structure of nuclei with A=205 are compiled; the results from various decay and reaction measurements are compared and evaluated. Inconsistencies and discrepancies in the level schemes are discussed. The values of r₀ parameter, used to calculate α HF, were obtained as in 72ElSc.     

Nuclear data sheets for A = 86

Detailed level and decay schemes are presented for the nuclei of the A = 86 mass chain. The experimental evidence on which this evaluation is based is given, and important discrepancies are noted. Adopted values for level energies, γ-ray intensities and energies, as well as other nuclear properties are given. Literature up to November 1977 has been considered.     

Nuclear data sheets for A = 53

Nuclear structure data available through April 1977 are compiled, and adopted level properties are given. The bulk of the data is presented pictorially for easy comparison. Experimental details, references, and additional comments, where required, are given in the text. All drawings, tables, and comments are reproduced from the computerized Evaluated Nuclear Structure Data File (ENSDF). Any additions or corrections desired by the users should be addressed to the compilers for maintenance and updating of the computer file.     

Nuclear data sheets for A = 207

Information on A = 211 used in a decay to A = 207 was prepared by M. J. Martin and will be puslished in Nuclear Data Sheets in 1978. The value of r₀ parameter, used to calculate a HF, were obtained as in 72ElSc.     

Nuclear data sheets for A = 242

The available nuclear structure information for all nuclei with mass number A = 242 is presented. Various decay and reaction data are evaluated. Adopted data, levels, spin and parity assignments are given.     

Nuclear data sheets for A = 69

Nuclear structure data available through September 1975 are compiled, and adopted level properties are given. The bulk of the data are presented pictorially for easy comparison. Experimental details, references, and additional comments, where required, are given in the text. All drawings, tables, and comments are reproduced from the computerized Evaluated Nuclear Structure Data File (ENSDF). Any additions or corrections desired by the users should be addressed to the compilers for maintenance and updating of the computer file.     

Nuclear data sheets for A = 76

Nuclear structure data available through June 1976 are compiled, and adoped level properties are given. The bulk of the data is presented pictorially for easy comparison. Experimental details, references, and additional comments, where required, are given in the text. All drawings, tables, and comments are reproduced from the computerized Evaluated Nuclear Structure Data File (ENSDF). Any additions or corrections desired by the users should be addressed to the compilers for maintenance and updating of the computer file.     

Nuclear data sheets for A = 104

Nuclear structure data available through January 1976 are compiled, and adopted level properties are given. The bulk of the data is presented pictorially for easy comparison. Experimental details, references, and additional comments, where required, are given in the text. All drawings, tables, and comments are reproduced from the computerized Evaluated Nuclear Structure Data File (ENSDF). Any additions or corrections desired by the users should be addressed to the compilers for maintenance and updating of the computer file.     

Nuclear data sheets for A = 138

Detailed level schemes and the experimental reaction and decay data on which they are based are presented for all the nuclei with mass number A = 138. The experimental data are evaluated; inconsistencies and discrepancies are noted; and adopted values for level and gamma-ray energies, gamma intensities, and other nuclear properties are given. All data received before December 1975 have been included.     

Nuclear data sheets for A = 136

The 1961 version of Nuclear Data Sheets for A = 136 has been revised according to experimental data received before September 1, 1973. Selected experimental data, discussions for J^π-assignments, and detailed level schemes are presented.Additional data now detail the decays of ¹³⁶Te, ¹³⁶Pm, and ¹³⁶Nd, and the level structure for ¹³⁶Xe, ¹³⁶Ba, ¹³⁶Ce, ¹³⁶Pr, and ¹³⁶Nd are improved significantly. The low-lying levels in ¹³⁶Ba are very well established. Additional information on the higher excitations in ¹³⁶Ba is needed, possibly through more definitive ¹³⁵Ba(n,γ)¹³⁶Ba experiments. The relative positions of the isomers in ¹³⁶I and the details of the level structure for ¹³⁶La and ¹³⁶Cs are still unknown. Areas of continuing experimental interest are the decays of ^136mI, ¹³⁶Nd, ¹³⁶Pm, and the quasirotational levels of ¹³⁶Ce and ¹³⁶Nd. The level structure of ¹³⁶Xe(¹³⁶Pr) will be subject to major additions (complete revision) in the near future. These new decay data were not included in this evaluation because of their preliminary nature.