The Disintegration of Antimony 124

Abstract

The radiations from antimony bombarded by slow neutrons have been investigated with the help of a magnetic lens spectrometer. Compton electrons, ejected from a copper radiator, and photoelectrons ejected from a thin lead radiator, were measured. Gamma-rays of the following energies were found: 2.062, 1.708, 0.714, 0.650, and 0.603 Mev. The beta-ray spectrum was measured and found to be complex. An analysis according to the Fermi theory gives the possibility of resolving the spectrum into five groups with the following end-point energies and relative abundances: 2.37 Mev, 21 percent; 1.62 Mev, 8 percent; 1.00 Mev, 9 percent; 0.65 Mev, 44 percent; 0.48 Mev, 18 percent. An internal conversion line was detected corresponding to a gamma-ray of 0.603 Mev. A gamma-ray attributed to Sb m (2.8d) was found to have an energy of 0.568 Mev. 1

Beta-Gamma-Angular Correlation

“…by a current sufficient to produce an a.c. field at the core of 1.5 oersteds or less. Webber, Reynolds, and McGuire, 7 who described the method in detail, observed that magnetic transitions obtained in this way for a single crystal of tin yielded critical fields in agreement with those obtained by other methods.…”

“…9 A re-analysis of the beta-spectrum data using forbidden shapes might reduce the number of betagroups necessary to fit the spectrum data, which is not unreasonable in light of the coincidence data not showing the 1.00 and 1.62 groups. 7 …”

Randomized dynamical decoupling techniques for coherent quantum control

“…In the context of coherent quantum control, the advantages of stochasticity have only recently been addressed [7,8,9,10,11,12]. Within the framework of dynamical decoupling methods, in particular, analytical bounds derived in [7] pointed to situations where randomized protocols are expected to outperform their deterministic counterparts in suppressing unwanted unitary dynamics as well as decoherence in open quantum systems.…”

“…Within the framework of dynamical decoupling methods, in particular, analytical bounds derived in [7] pointed to situations where randomized protocols are expected to outperform their deterministic counterparts in suppressing unwanted unitary dynamics as well as decoherence in open quantum systems. The idea of merging together deterministic and randomized designs into hybrid control schemes, where benefits from both approaches may be simultaneously exploited, was also proposed in [7] in general control-theoretic terms, and independently validated in illustrative situations in [9,10,11] (see also [12]).…”

Superconductivity of Columbium

“…2 Extensive measurements have been made by Endo, 3 Hayes 4 and Chavalier. 5 Snoek, 6 Hayes 4 and N6el 7,8 have speculated on the cause of ferromagnetism in «Fe20 3 . The Curie point of aFe203 is about 680°C.…”