Die Zerfallsenergie von Ti51

Koester, L.; Maier-Leibnitz, H.; Mayer-Kuckuk, Th.; Schmeiser, Kurt; Schulze-Pillot, G.

doi:10.1007/bf01948708

Cited by 7 publications

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“…of about 4 with 0.2M TTA in toluene. 7 Plates prepared by the TTA method proved to be excellent for alpha-particle pulse analysis since the energy degradation by sample selfabsorption is negligible.…”

Section: Methodsmentioning

confidence: 99%

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Berkelium and Californium Isotopes Produced in Neutron Irradiation of Plutonium

et al. 1954

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Californium isotopes of mass numbers 249, 250, 251, and 252 have been identified by mass spectrometric analyses of californium samples produced from neutron-irradiated plutonium. The half-lives of Bk 249 , Cf 249 , Cf 250 , Cf 252 , and Cf 253 are 290±20 days, 470±100 years, 10.0d=2.4 years, 2.2db0.2 years, and 18±3 days, respectively. The alpha-particle energies of the most prominent alpha peaks for Cf 249 , Cf 250 , and Cf 252 are 5.81±0.03, 6.033 ±0.010, and 6.117±0.010 Mev, respectively. The plot of alphaparticle energies vs mass number for the isotopes of californium shows a break (i.e., the alpha energy of Cf 252 is larger than the alpha energy of Cf 250 ) indicating an irregularity in the nuclear energy surface. The alpha spectra of Cf 250 and Cf 252 exhibit characteristic even-even nuclide fine structure peaks. The betaparticle energy of Bk 249 is 80±20 kev. The spontaneous fission half-lives of Cf 250 and Cf 252 are 1.5±0.5X10* and 66±10 years, respectively. Lower limits of 2X10 8 and 5X10 6 years have been placed on the partial spontaneous fission half-lives of Bk 249 and Cf 249 . The pile (Materials Testing Reactor at Arco, Idaho) neutron capture cross sections of Bk 249 , Cf 250 , Cf 251 , and Cf 252 are 350, 1500, 3000, and 25 barns, respectively.

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Section: Methodsmentioning

confidence: 99%

“…A disintegration energy of 1.7 Mev is much smaller than that expected from a consideration of the energy systematics of odd-mass beta emitters. Koester et al 7 also find the beta spectrum to be complex but report the maximum beta energy to be 2.2 Mev. They conclude that this transition leads to the ground state.…”

Section: Pile Neutron Cross Sectionsmentioning

confidence: 94%