排序方式: 共有19条查询结果,搜索用时 62 毫秒
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J.M. Nitschke M. Fowler A. Ghiorso R.E. Leber M.E. Leino M.J. Nurmia L.P. Somerville K.E. Williams E.K. Hulet J.H. Landrum R.W. Lougheed J.F. Wild C.E. Bemis R.J. Silva P. Eskola 《Nuclear Physics A》1981,352(1):138-146
A rotating drum system was used to search for an 80 ms spontaneous fission (sf) activity in the reaction of 15N with 249Bk. No such activity was found beyond a cross section limit of 0.5 nb. A sf activity with a half-life of 23 ± 2 ms and a maximum formation cross section of 19 ± 4 nb at 82 MeV was observed. The identity of this activity has not been determined. 相似文献
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P.A. Butler I.Y. Lee J.O. Newton Y. El-Masri M.M. Aleonard P. Colombani R.M. Diamond F.S. Stephens R.W. Lougheed E.K. Hulet 《Physics letters. [Part B]》1977,68(2):122-124
Excitation functions and angular distributions have been measured for the fission of 232Th, 238U, 244Pu and 248Cm induced by 86Kr and 136Xe ions at energies in the vicinity of the Coulomb barrier. No large differences as a function of either target or projectile were found. These results suggest that the main process occuring is not Coulomb fission. 相似文献
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Thomas J. Schwan Guy S. Lougheed Stanley E. Burrous 《Journal of heterocyclic chemistry》1974,11(5):807-810
The, facile preparation of 4-pbenyltetrabydroisoquinolines by the acid-catalyzed cyclization of 2-benzylamino-1-pbenyletbanols and related compounds is described along with a discussion of the scope, limitations, and possible mechanism of the reaction. 相似文献
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