Entry Distribution, Fission Barrier, and Formation Mechanism of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow><mml:mn>102</mml:mn></mml:mrow><mml:mrow><mml:mn>254</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow><mml:mi>o</mml:mi></mml:math>
P. ReiterArgonne National Laboratory, Argonne, Illinois 60439T. L. KhooArgonne National Laboratory, Argonne, Illinois 60439T. LauritsenArgonne National Laboratory, Argonne, Illinois 60439C. J. ListerArgonne National Laboratory, Argonne, Illinois 60439D. SeweryniakArgonne National Laboratory, Argonne, Illinois 60439A. A. SonzogniArgonne National Laboratory, Argonne, Illinois 60439I. AhmadArgonne National Laboratory, Argonne, Illinois 60439N. AmzalUniversity of Liverpool, Liverpool L69 7ZE, EnglandP. BhattacharyyaPurdue University, West Lafayette, Indiana 47097P. A. ButlerUniversity of Liverpool, Liverpool L69 7ZE, EnglandM. P. CarpenterArgonne National Laboratory, Argonne, Illinois 60439A. J. ChewterUniversity of Liverpool, Liverpool L69 7ZE, EnglandJ. A. CizewskiArgonne National Laboratory, Argonne, Illinois 60439C. N. DavidsArgonne National Laboratory, Argonne, Illinois 60439Ke DingRutgers University, New Brunswick, New Jersey 08903Ν. FotiadesRutgers University, New Brunswick, New Jersey 08903J. P. GreeneArgonne National Laboratory, Argonne, Illinois 60439P. T. GreenleesUniversity of Liverpool, Liverpool L69 7ZE, EnglandA. HeinzArgonne National Laboratory, Argonne, Illinois 60439W. HenningArgonne National Laboratory, Argonne, Illinois 60439R.-D. HerzbergUniversity of Liverpool, Liverpool L69 7ZE, EnglandR. V. F. JanssensArgonne National Laboratory, Argonne, Illinois 60439Graeme JonesUniversity of Liverpool, Liverpool L69 7ZE, EnglandF. G. KondevArgonne National Laboratory, Argonne, Illinois 60439W. KortenDAPNIA/SPhN, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, FranceM. LeinoUniversity of Jyväskylä, Jyväskylä, FinlandS. SiemArgonne National Laboratory, Argonne, Illinois 60439J. UusitaloArgonne National Laboratory, Argonne, Illinois 60439K. VetterLawrence Berkeley National Laboratory, Berkeley, California 94720I. WiedenhöverArgonne National Laboratory, Argonne, Illinois 60439
2000lv
ABI
Аннотация
The entry distribution in angular momentum and excitation energy for the formation of ${}^{254}\mathrm{No}$ has been measured after the ${}^{208}\mathrm{Pb}{(}^{48}\mathrm{Ca},2n)$ reaction at 215 and 219 MeV. This nucleus is populated up to spin $22\ensuremath{\Elzxh}$ and excitation energy $\ensuremath{\gtrsim}6\mathrm{MeV}$ above the yrast line, with the half-maximum points of the energy distributions at $\ensuremath{\sim}5\mathrm{MeV}$ for spins between $12\ensuremath{\Elzxh}$ and $22\ensuremath{\Elzxh}$. This suggests that the fission barrier is $\ensuremath{\gtrsim}5\mathrm{MeV}$ and that the shell-correction energy persists to high spin.
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