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Title: Crystal Blocking Measurements of the Time Delay of Fission Induced by 32S, 48Ti, and 58Ni Bombardment of W

Abstract

The time delay in fission induced by bombardment of W with 180 MeV 32S, 240-255 MeV 48T and 315-375 MeV 58Ni has been measured by observation of crystal blocking. There is a clear narrowing and a small increase in the minimum yield of the angular dips for fission compared with scaled dips for elastically scattered ions. This is interpreted as a fission delay of about 2 as, only weakly dependent on energy and atomic number. The delay is longer by one to two orders of magnitude than obtained from standard interpretations of measurements of pre-scission neutrons and giant-dipole-resonance gamma-rays and from calculations of the nuclear dynamics in heavy-ion reactions.

Authors:
 [1];  [1];  [2];  [3];  [4];  [4];  [5];  [4];  [4];  [4];  [4];  [6];  [7];  [7]
  1. Aarhus University
  2. Universite de Montreal
  3. FLNR-JINR, Russia
  4. ORNL
  5. {nmn} [ORNL
  6. Weizmann Institute of Science, Rehovot, Israel
  7. University of Bologna
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Holifield Radioactive Ion Beam Facility
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931041
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 99; Journal Issue: 16
Country of Publication:
United States
Language:
English

Citation Formats

Andersen, J. U., Chevallier, J., Forster, J. S., Karamian, S. A., Vane, C Randy, Beene, James R, Galindo-Uribarri, Alfredo, Gomez Del Campo, Jorge, Krause, Herbert F, Padilla-Rodal, Elizabeth, Radford, David C, Broude, C., Malaguti, F., and Uguzzoni, A. Crystal Blocking Measurements of the Time Delay of Fission Induced by 32S, 48Ti, and 58Ni Bombardment of W. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.99.162502.
Andersen, J. U., Chevallier, J., Forster, J. S., Karamian, S. A., Vane, C Randy, Beene, James R, Galindo-Uribarri, Alfredo, Gomez Del Campo, Jorge, Krause, Herbert F, Padilla-Rodal, Elizabeth, Radford, David C, Broude, C., Malaguti, F., & Uguzzoni, A. Crystal Blocking Measurements of the Time Delay of Fission Induced by 32S, 48Ti, and 58Ni Bombardment of W. United States. doi:10.1103/PhysRevLett.99.162502.
Andersen, J. U., Chevallier, J., Forster, J. S., Karamian, S. A., Vane, C Randy, Beene, James R, Galindo-Uribarri, Alfredo, Gomez Del Campo, Jorge, Krause, Herbert F, Padilla-Rodal, Elizabeth, Radford, David C, Broude, C., Malaguti, F., and Uguzzoni, A. Mon . "Crystal Blocking Measurements of the Time Delay of Fission Induced by 32S, 48Ti, and 58Ni Bombardment of W". United States. doi:10.1103/PhysRevLett.99.162502.
@article{osti_931041,
title = {Crystal Blocking Measurements of the Time Delay of Fission Induced by 32S, 48Ti, and 58Ni Bombardment of W},
author = {Andersen, J. U. and Chevallier, J. and Forster, J. S. and Karamian, S. A. and Vane, C Randy and Beene, James R and Galindo-Uribarri, Alfredo and Gomez Del Campo, Jorge and Krause, Herbert F and Padilla-Rodal, Elizabeth and Radford, David C and Broude, C. and Malaguti, F. and Uguzzoni, A.},
abstractNote = {The time delay in fission induced by bombardment of W with 180 MeV 32S, 240-255 MeV 48T and 315-375 MeV 58Ni has been measured by observation of crystal blocking. There is a clear narrowing and a small increase in the minimum yield of the angular dips for fission compared with scaled dips for elastically scattered ions. This is interpreted as a fission delay of about 2 as, only weakly dependent on energy and atomic number. The delay is longer by one to two orders of magnitude than obtained from standard interpretations of measurements of pre-scission neutrons and giant-dipole-resonance gamma-rays and from calculations of the nuclear dynamics in heavy-ion reactions.},
doi = {10.1103/PhysRevLett.99.162502},
journal = {Physical Review Letters},
number = 16,
volume = 99,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}