Fusion versus Breakup: Observation of Large Fusion Suppression for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>9</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>B</mml:mi><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:mrow><mml:mrow><mml:mn>208</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi>Pb</mml:mi></mml:math>
M. DasguptaDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaD. J. HindeDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaR. D. ButtDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaR. M. AnjosInstituto de Física, Universidade Federal Fluminense, Av. Litoranea, Niterói, RJ, 24210-340, BrazilA. C. BerrimanDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaN. CarlinInstituto de Física, Universidade de Sao Paulo, Caixa Postal 66318, 05315-970 Sao Paulo, S.P., BrazilP. R. S. GomesInstituto de Física, Universidade Federal Fluminense, Av. Litoranea, Niterói, RJ, 24210-340, BrazilC. R. MortonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaJ.O. NewtonDepartment of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, AustraliaA. Szanto de ToledoInstituto de Física, Universidade de Sao Paulo, Caixa Postal 66318, 05315-970 Sao Paulo, S.P., BrazilK. HaginoInstitute for Nuclear Theory, Department of Physics, University of Washington, Seattle, Washington 98915
1999lv
ABI
Аннотация
Complete fusion excitation functions for ${}^{9}\mathrm{Be}{+}^{208}\mathrm{Pb}$ have been measured to high precision at near barrier energies. The experimental fusion barrier distribution extracted from these data allows reliable prediction of the expected complete fusion cross sections. However, the measured cross sections are only 68% of those predicted. The large cross sections observed for incomplete fusion products support the interpretation that this suppression of fusion is caused by ${}^{9}\mathrm{Be}$ breaking up into charged fragments before reaching the fusion barrier. Implications for the fusion of radioactive nuclei are discussed.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 2Использованных источников: 0