Search

We have studied a family with an X/X translocation which was found in a 16-year-old daughter and in her 34-year-old mother. The daughter had short stature, secondary amenorrhea, and many Turner’s stigmata. The mother, 5-ft tall, had a few Turner’s stigmata and had developed secondary amenorrhea at age 24. Both peripheral leukocyte and skin fibroblast cultures of the daughter revealed, by conventional karyotype analysis, 46 chromosomes with one C-group chromosome missing and with an extra No. 2-like chromosome in all metaphase cells examined. By both Q- and G-banding techniques, this abnormal karyotype was identified as 46,X, + t(X;X)(p22;ql3). An identical translocation chromosome was demonstrated in the mother’s cells, but 50 % of the cells had a 45,X chromosomal constitution. Autoradiographic studies showed that the X/X translocation chromosome was the late-replicating X in all cells examined from both the daughter and the mother. The difference in the phenotypic manifestations of the daughter and of her mother can be explained perhaps by the different contents of the other active X chromosomes. When the same X chromosome is inactivated in all cells, mutations present in the active X chromosome are not compensated and therefore are expressed.

The 1960 version of the Nuclear Data Sheets for A = 112 has been revised on the basis of experimental data received before September 1971. Experimental data from ≈75 papers, comparisons with theory, arguments for J π assignments, and detailed level schemes are presented. In this mass chain, only the level structure of 112 Cd has been experimentally studied to any appreciable extent.

The 1960 version of the Nuclear Data Sheets for A = 111 has been revised on the basis of experimental data received before February 1971. Data received during February 1971 have been added in proof. Experimental data, adopted values, comparisons with theory, arguments for J π assignments, and detailed level schemes are presented. Comments given by compilers serve to highlight interesting features, to focus attention on existing discrepancies, and to suggest possible new experiments. The material is organized into four parts. The level scheme drawings together with the “Summary Sheets” represent the quintessence of the numerical data which are tabulated, with minimum essential information on experimental conditions, in greater detail in the “Data Sheets.” We have attempted to make the compilation as self-contained as possible, but the interested and inquisitive reader always has recourse to the detailed bibliography provided at the end of this compilation.

Molecular reorientation in (NH4)2SO4 has been studied using slow-neutron scattering. The results are compared with Skold's model and NMR measurements, and used to demonstrate the capabilities of the neutron-scattering method for probing reorientations in solids.

The 1960 version of the Nuclear Data Sheets for A=113 has been revised on the basis of experimental data received before August 1970. Experimental data, adopted values, comparisons with theory, arguments for Jπ-assignments, and detailed level schemes are presented. Comments are given by the compilers on 113Pd decay, on the energy of 1.2−m 113Ag relative to that of 5.4−h 113Ag, on the negative parity states in 113Cd, on the K-capture from 99.4−m 113In, and on the disintegration energy of 113Sn, to cite a few examples. These serve to highlight interesting features, to focus attention on the existing discrepancies, and to suggest possible new experiments. Additional experiments, particularly of the reaction type, are desirable on all nuclei with A=113. This compilation is based on data received before August 1970. Data received during September 1970 have been added in proof.

Lifetimes in the 10−10 sec range were determined by simultaneously observing the time as well as energy distributions of γ-rays detected by a large-volume coaxial Ge(Li) detector. This simultaneous observation was accomplished by the use of a two-parameter analyzer operated in the 512×32 channel mode. The fiducial time for the time distribution was provided by the pulsed beam initiating (p, poγ) and (p, nγ) reactions on enriched Cd targets. Observed time distributions of delayed γ-rays ranging from 300 to 700 keV were analyzed using three different methods: centroid shift, shape fitting and area analyses. Half-lives determined by these methods are mutually consistent. It is shown that the half-life corresponding to an observed shift as small as 1/140 of the prompt distribution width (fwhm) may be reliably determined from the data.

The γ-spectra from 58 Cu and the neutron spectra from the 58 Ni(p,n) 58 Cu reaction have been utilized to check the energy calibration of the analyzing magnet.

Low-lying states of Fe/sup 55/ were obtained by the reaction tron groups in addition to the groups corresponding to ground, 413, and 933-kev states of Fe/ sup 55/. Fluctuations in the excitation functions of a nature explained in terms of a coherence energy were clearly observed. Angular distributions of the neutron groups were asymmetric about 90 deg , and the excitation functions for the different groups fluctuated together, implying non-validity of statistical compound reaction assumptions for this investigation. (D.C.W.)

A state at 801±2 keV in In111 was observed by the (p, n) reaction on Cd111. This was established from the neutron time-of-flight spectra as well as from the γ-ray spectra following the neutron emission. The incident proton energies ranged from 4.2 to 5.35 MeV. The angular distribution of neutrons and the preferential decay of this state to the spin-parity ½− state at 535 keV show that the spin is 32 or 52, and most probably 32.