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THE EFFECT OF PION CONDENSATE IN ORDINARY FINITE nuclei

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Science China Mathematics 1989年第2期32卷 196-209页

作者：赵叔平刘宗廉马维兴冯正永 Institute of Management Academia Sinica Beijing Center of Theoretical Physics CCAST (World Lab.) and Institute of High Energy Physics Academia Sinica Beijing Department of Modern Physics University of Science and Technology of China Hefei

According to A. B. Migdal’s prediction that a pion condensate should exist in ordinaryfinite nuclei. a nucleon density modulation due to pion condensate has been obtained frompseudovector pion nucleon coupling and phenomenological effective repulsion *** on the nucleon density modulation, we study the effects of pion condensate in somenuclear phenomena, such as high energy particle nucleus scattering, X-ray energy spectrumof muonic atom and nuclear binding *** results strongly indicate that there aresome sufficient opportunities in these processes for pion condensate to manifest itself andthe condensate could help us to improve the agreement between theory and experiments formany processes.

关键词： pion condensate finite nuclei.

Optimal reactions for the synthesis of superheavy nucleus ^(270)Hs

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Science China(Physics,Mechanics & Astronomy) 2006年第6期49卷 641-648页

作者： LIU Zuhua1,3 & BAO Jingdong1,2 1. Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China 2. Physics Department, Beijing Normal University, Beijing 100875, China 3. China Institute of Atomic Energy, Beijing 102413, China Key Laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing China China Institute of Atomic Energy Beijing China Physics Department Beijing Normal University Beijing China

The superheavy nucleus 270Hs is expected to be a “double-magic” deformed nucleus. We have calculated its cross sections of evaporation residue for the reactions 248Cm(26Mg,4n)270Hs, 244Pu(30Si,4n)270Hs, 238U(36S,4n)270Hs and 226Ra(48Ca,4n)270Hs using a two-parameter Smoluchowski equation. It is found from our results that 226Ra(48Ca,4n)270Hs and 238U(36S,4n)270Hs are two optimal reactions for the synthesis of the superheavy nucleus 270Hs due to their large negative Q-values.

关键词： diffused fusion barrier,Smoluchowski equation,superheavy nuclei.

A New Exploration of "Fell Problem" in Active Galactic nuclei.I——Preliminary Consideration

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Chinese Science Bulletin 1994年第6期39卷 488-492页

作者：魏春艳程福臻尤峻汉黄卫红 KWAN John Center for Astrophysics University of Science and Technology of China Hefei 230026 PRC Department of Physics Shanghai Jiaotong University Shanghai 200030 PRC Shanghai Astronomical Observatory Shanghai 200030 PRC Department of Physics and Astronomy University of Massachusetts MA 01002 USA

Since the unknown emission features in the spectrum of quasar 3C 273 have beenfirst identified as the blended Fell multiplets, many papers have contributed to thetheoretical and observation research of Fell emission i... 详细信息

关键词： emission lines accretion disks active galactic nuclei.