M.R. Schmorak

Survey of nuclear structure systematics for A ⩾ 229

Abstract Log ft values for β- and e -transitions and experimental hindrance factors for a -decays are presented for the A ⩾ 229 mass region in a systematic way. For some favored and hindered a -transitions, comparisons of experimental hindrance factors with theoretical calculations are made. Band-head energies and rotational band parameters are given. Measured magnetic moments of odd-A nuclei are compared with those calculated using Nilsson wavefunctions. Experimental B(E2)† values to first 2 + states in even-even nuclei are plotted as a function of mass number.

Systematics of nuclear level properties in the lead region

Abstract This survey of the lead region is an extension of our “Survey of Nuclear Structure Systematics for A ≥ 229” (72ElSc) published previously. The mass range covered is primarily A = 190 through A = 221. The emphases are on properties of low-lying states, their shell-model configurations, and their decay modes. A comprehensive systematics of α-decay hindrance factors is presented; for β − decay, only transitions between pure single-particle states are included in the log ft systematics. For IT decays the important case of M4 transitions is presented. Magnetic dipole moments are tabulated and the additivity relation is examined. The starting point of the present survey was the Evaluated Nuclear Structure Data File (ENSDF) (see the Cumulated Index to A-Chains on page iii of this issue for references to the individual mass chains). Most changes and updates of this file, made in the course of preparing the present survey, are mentioned in the text. We refer the reader to Nuclear Data Sheets for information on high-lying states, spectroscopic factors, documentation of the data, and other topics not treated in this survey.

Nuclear data sheets for A = 182

Abstract The available experimental data pertaining to the nuclear structure of nuclei with A = 182 are compiled; the results from various decay and reaction measurements are compared and evaluated. Inconsistencies and discrepancies in the level schemes are discussed. The “Level Properties” section in the Summary Sheets contains the most complete information on level energies, J π , and T 1/2 .

Nuclear data sheets for A = 192

The available experimental data pertaining to the nuclear structure of nuclei with A = 192 are compiled; the results from various decay and reaction measurements are compared and evaluated. Inconsistencies and discrepancies in the level schemes are discussed. Level properties, gamma-ray properties, and comments are presented following the data on the relevant nucleus.

Nuclear data sheets for A = 232, 236, 240*

Abstract The available experimental data pertaining to the nuclear structure of nuclei with mass numbers A = 232, 236, and 240 are compiled. The results from various decay and reaction measurements, as available through October 1976, are compared and evaluated. Q-values referenced as 75ScYK are obtained from a least-squares adjustment as explained in Table 3, 76Sc02.

Nuclear data sheets update for A = 239

Abstract Experimental data pertaining to nuclear structure of nuclei with mass number A=239 have been compiled and evaluated.

Nuclear data sheets for A = 199

Experimental data pertaining to nuclei with A = 199 are compiled and evaluated. copyright 1988 Academic Press, Inc.

Nuclear Data Sheets for (even-A) A = 244 through A = 262

Abstract The available experimental data pertaining to the nuclear structure of nuclei with even mass numbers A = 244 through 262 are compiled (the odd-A mass chains will be published in 1976). The results from various decay and reaction measurements, as available through September 1975, are compared and evaluated and α -hindrance factors are calculated (see Table 2).

Nuclear Data Sheets for A = 186

The available experimental data pertaining to the nuclear structure of nuclei with A = 186 are compiled; the results from various decay and reaction measurements are compared and evaluated. Inconsistencies and discrepancies in the level schemes are discussed. Level properties and gamma-ray properties are presented.

Spontaneous fission activities

Abstract For several years, the Nuclear Data Project has been using a standard computer-readable format 1 to organize the results of data evaluations published in Nuclear Data Sheets . Adopted values for level energies, spins, half-lives, radiation properties, and spectroscopic factors are recorded in standard blocks of information, which are then filed onto indexed direct-access storage. The resulting Evaluated Nuclear Structure Data File (ENSDF) is then available as a standard source of nuclear structure information. 2 Computer organization of selected data into pages has been a feature of Nuclear Data Sheets since 1975. As an illustration of the power and potential usefulness of the ENSDF system, we present a collection of nuclear levels for which the spontaneous fission has been studied. The values tabulated have appeared in recent issues of Nuclear Data Sheets . 3 The selection of values and arrangement into a table has been done completely automatically. We welcome comments and criticisms about the form or content of this table.