A table is presented of a complete list of the radioactive and stable isotopes, with a number of their salient features, as recorded in the literature or by private communications up to February 1958. (W.D.M.)

Table of isotopes

https://escholarship.org/content/qt65v5x6mx/qt65v5x6mx.pdf?t=p0uwbn

Nuclear masses and deformations

Empirical evidence suggests that neutron pairing plays an important role for the stability of nuclei near the neutron drip line. It is shown that the low binding of these nuclei will lead to a neutronization of the nuclear surface and possibly to large cross-sections for Coulomb dissociation, which then offers a new way to study clusters and their binding energies.

http://iopscience.iop.org/article/10.1209/0295-5075/4/4/005/pdf

The Neutron Halo of Extremely Neutron-Rich Nuclei

https://www.cns.s.u-tokyo.ac.jp/~shimoura/research/nuc_data/pdf/13.pdf

Energy levels of light nuclei A = 13-15

Instrumental activation analysis of standard rocks with high-resolution γ-ray detectors☆

The nuclear properties of the heavy elements

/pdf/fragment-production-in-the-interaction-of-5-5-gev-protons-5els8wq7tj.pdf

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium

Solid-state devices developed primarily for nuclear gamma spectroscopy have many potential uses in x-ray analysis.

/pdf/application-of-high-resolution-semiconductor-detectors-in-x-4n8yjbi6v3.pdf

Application of High-Resolution Semiconductor Detectors in X-ray Emission Spectrography.

Data obtained with semiconductor detectors and a particle-identifier system on fragments ejected from uranium bombarded with 5.3-GeV protons show that $^{11}\mathrm{Li}$, $^{14}\mathrm{B}$, and $^{15}\mathrm{B}$ are particle stable, $^{10}\mathrm{Li}$ is particle unstable, and $^{13}\mathrm{Be}$ is most probably particle unstable.

New Isotopes: 11 Li, 14 B, and 15 B

Five neutron-deficient isotopes of thorium lighter than mass 218 were studied at the Berkeley Heavy Ion Linear Accelerator by bombardment of enriched $^{206}\mathrm{Pb}$ with $^{16}\mathrm{O}$. Silicon (Au) surface-barrier detectors were used in on-line measurements performed to determine $\ensuremath{\alpha}$-decay characteristics. Mass-number assignments of $^{213}\mathrm{Th}$ through $^{217}\mathrm{Th}$ were made on the basis of excitation functions and systematic trends in $\ensuremath{\alpha}$-decay properties. Half-lives and $\ensuremath{\alpha}$-particle energies were determined. New information was also obtained about the $\ensuremath{\alpha}$-decay characteristics of $^{216}\mathrm{Ac}$, $^{215}\mathrm{Ra}$, $^{214}\mathrm{Fr}$, and $^{212}\mathrm{At}$. Systematic occurrence of complex structure in the $\ensuremath{\alpha}$ decay of even-$Z$ 125-neutron nuclei is discussed, and spins and parities are suggested for three lowest-energy levels of $^{211}\mathrm{Ra}$, $^{209}\mathrm{Rn}$, and $^{207}\mathrm{Po}$. Systematic occurrence of isomerism in odd-$Z$ 127-neutron nuclei is also discussed, and spins and parities are suggested for several levels. On the basis of the extreme regularity of the experimental $\ensuremath{\alpha}$ energies, predictions are made for the energies of several unknown neutron-deficient isotopes of thorium, protactinium, uranium, and neptunium. In the experimental work, the helium-jet transport method was used to remove the $\ensuremath{\alpha}$-emitting products from the target region. Technical details concerning the application of the method to millisecond activities are discussed.

/pdf/new-isotopes-of-thorium-studied-with-an-improved-helium-jet-b9lt7tnvui.pdf

Earl K. Hyde

Papers

The nuclear properties of the heavy elements

Fragment Production in the Interaction of 5.5-GeV Protons with Uranium

Application of High-Resolution Semiconductor Detectors in X-ray Emission Spectrography.

New Isotopes: 11 Li, 14 B, and 15 B

New Isotopes of Thorium Studied with an Improved Helium-Jet Recoil Transport Apparatus