Search

The peak-to-total ratio and absolute efficiency of a 5″ dia. × 5″ NaI crystal for gamma-ray energies from 0.4 to 9.2 MeV have been measured by using a magnetic spectrometer to isolate nuclear states which decay by only one gamma transition. Particle-gamma-ray coincidence measurements provide the pulse-height spectrum for a single gamma-ray energy. The detector efficiency is determined by detecting only those particles leading to the nuclear state which provides the desired gamma ray. The efficiency is given by the ratio of the coincidence counts in the gamma-ray spectrum to the particle counts in the spectrometer. The peak-to-total ratio data were supplemented by singles measurements from some gamma-ray sources and (p,γ) and (p,αγ) reactions.

The γ-ray decay of neutron particle-hole states in 140 Ce has been studied with the reaction 140 Ce(p,p′γ o ) 140 Ce. Evidence is presented that the strong ground-state γ rays observed from some of these states are E1 transitions. This allows the identification of 1 − states.

Proton resonance structure was observed in the 205Tl(d, p) reaction at single-particle energies for out-going protons leading to all strongly excited states below 3 MeV excitation in 206Tl. Decay of the isobaric analog of the 207Tl ground state was not observed.

Symptoms associated with one unit of solution of posterior pituitary extract given intravenously occur frequently but are transient, variable, and do not contraindicate the use of the drug. Injections have been given to thousands of patients and only one in over 28 years was found to be unusually susceptible, and while she was sick for several hours, she was never critically ill. She also consented to two subsequent studies. Death is usually due to hemorrhage and shock from the ruptured uterus following the injection of from 5 to 10 units of the pituitary solution. There are numerous subjective symptoms in postpartum patients receiving oxytocic medication intravenously. In 2 groups of patients totaling 37 who received intravenous injections of ergonovine maleate 0.4 mg., there were 57 per cent who experienced cramping; 19 per cent dizziness; 14 per cent nausea (one case associated with emesis); 14 per cent flushing; and small numbers who complained of cardio- or laryngospasm, headache, desire to defecate or to urinate, tingling of breasts, tinnitus, and palpitation. Very few of the symptoms can be attributed to the psychic effect of an intravenous injection. Also, there were 58 per cent who developed a transient rise in blood pressure after intravenous ergonovine. Thus, one must conclude that a therapeutic dosage of ergonovine given intravenously can produce definite, distressing symptoms which are transient and variable.

The presence of isospin coupling in the incident channel is observed as anomalous behavior in $^{98}\mathrm{Mo}$+$p$ excitation functions for proton, deuteron, and triton outgoing channels. Similarly shaped anomalies are simultaneously observed in several channels at threshold energies for the ($p, n$) reaction to the ground-state analog and to excited-state analogs of $^{98}\mathrm{Mo}$. The latter imply coupling through a deformation of the isospin-dependent potential.