Das Neutroneneinfangspektrum von Sm150

Abstract

The internal conversion electrons and the gamma-rays emitted by Samarium after neutron capture were measured by means of a betaspectrometer and a bent-crystal spectrometer at the research reactor at Garching near Munich. Lines corresponding to 50 transitions between 59 keV and t"7 MeV were found with the betaspectrometer. The measurement with the crystal spectrometer showed I1 lines between 250 keV and 740 keV. The multipolarity of a few lines was determined. A level scheme containing most of the measured lines is suggested.

The Expanding Use of DNA in Law Enforcement: What Role for Privacy?

“…According to Dr. Frederick R. Bieber, low stringency database searches using the current thirteen-locus STR analysis would be expected to lead to too many partial-profile hits to be of any practical use in the majority of investigations, because many alleles are very common in the population and would be shared by large numbers of individuals. 51 New technologies, however, may increase the utility of low stringency searches. 52 The Forensic Science Service of the United Kingdom has begun offering "familial searching" to police to aid in investigations.…”

“…51 New technologies, however, may increase the utility of low stringency searches. 52 The Forensic Science Service of the United Kingdom has begun offering "familial searching" to police to aid in investigations. A few well known cases in the U.K. were actually solved using leads developed through low stringency searching.…”

“…It has been suggested that where a rare surname is associated with a distinct Y chromo-some haplotype, it would be possible to do a surname search after analyzing crime scene DNA. 54 For this to be possible, a surname haplotype database would need to be established. Then, if DNA analysis of crime scene evidence indicated the distinctive Y chromosome haplotype of, for example, the Darwinsky family, police could check the whereabouts of all of the people in a certain area with the surname of Darwinsky.…”

Energy Levels inSm148andSm150

“…14 Previously Coulomb excitation of a level at 770±20 keV had been observed. 20 A most extensive study of Sm 150 which used results of ^-spectrometer studies of conversion electrons and bent crystal spectrometer observations on Sm 149 (w,Y)Sm 150 has been reported by Bieber et al 21 Here again, as in Sm 148 , the excitation energies from this work appear systematically higher than those from the electron data and the latter should be considered more accurate. The differences are in all cases within the estimated experimental error.…”