Model calculations of a two-step reaction scheme for the production of neutron-rich secondary beams

نویسندگان

  • K. Helariutta
  • J. Benlliure
  • M. V. Ricciardi
  • K.-H. Schmidt
چکیده

A two-step reaction scheme for the production of extremely neutron-rich radioactive beams, fission followed by cold fragmentation, is considered. The cross sections of the second step, the cold fragmentation of neutron-rich fission fragments, are estimated with different computer codes. Discrepancies between an empirical systematics and nuclear-reaction codes are found. PACS: 25.40.Sc Spallation reactions 25.85.-w Fission reactions 25.60.-t Reactions induced by unstable nuclei 25.60.Dz Interaction and reaction cross sections

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Model calculations of a two-step reaction scheme for the production of the neutron-rich secondary beams

Actually, the design of more powerful next-generation secondary-beam facilities is being intensively discussed. The main challenge is the production of neutron-rich isotopes, because the neutron-drip line has only been reached for the lightest elements. The traditional way for producing neutronrich nuclei is fission of actinides. Another approach introduced recently, based on cold fragmentation...

متن کامل

Production of medium-mass neutron-rich nuclei from fragmentation of Sn

Medium-mass neutron-rich nuclei are important for nuclear structure investigations (e.g. shell evolution with neutron excess) and nuclear astrophysics (e.g. r-process in nucleosynthesis). However, these investigations are limited because of the difficulties in producing medium-mass nuclei with a large neutron excess. The traditional way for producing neutron rich nuclei was fission of actinides...

متن کامل

Reaction mechanisms involved in the production of neutron-rich isotopes

The reaction mechanisms best suited for the production of neutron-rich nuclei, fragmentation and fission, are discussed. Measurements of the production cross sections of reaction residues together with model calculations allow to conclude about the expected production rates of neutron-rich isotopes in future facilities.

متن کامل

Investigation of Neutron Contamination of Flattening Filter and Flattening Filter-Free 10-MV Photon Beams in Elekta InfinityTM Accelerator

Introduction: This study aimed to measure the neutron contamination of flattening filter (FF) and flattening filter-free (FFF) 10-MV photon beams delivered by the Elekta InfinityTM accelerator. Material and Methods: The photoneutron spectrum produced by the Linac head was evaluated using a Monte Carlo (MC) simulation. The geometry ...

متن کامل

Assessment of secondary particles in breast proton therapy by Monte Carlo simulation code using MCNPX

Background: The present study aimed to investigate the equivalent dose in vital organs, including heart and lung, due to secondary particles produced during breast proton therapy. Materials and Methods: The numerical ORNL female-phantom was improved and simulated using the Monte Carlo MCNPX code. The depth-dose profile of proton beams with different energies was simulated. The proper energy ran...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2002