Identification of more than a 100 new isotopes from 238U projectile fission and beams of neutron-rich nuclei at BRENDA
✍ Scribed by M. Bernas; P. Armbruster; S. Czajkowski; C. Donzaud; H. Geissel; F. Ameil; Ph. Dessagne; C. Engelmann; A. Heinz; Z. Janas; C. Kozhuharov; Ch. Miehe; G. Münzenberg; M. Pfützner; C. Böcksteigel; K.-H. Schmidt; W. Schwab; C. Stéphan; K. Sümmerer; L. Tassan-Got; B. Voss
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 693 KB
- Volume
- 616
- Category
- Article
- ISSN
- 0375-9474
No coin nor oath required. For personal study only.
✦ Synopsis
Projectile fission of 23sU was investigated at a bombarding energy of 750 A.MeV using Pb and Be targets. The fully stripped forward emitted fragments from Ti to Cs were analyzed with the Fragment Separator (FRS) an unambiguously identified by d their energy-loss and time-of-flight.
The magnetic selection of the largest momenta acted as a trigger of the low-energy fission component.
More than a hundred new nuclear species were identified including the 7sNi, for which a cross-section of 300 pb was measured.
1 Introduct ion
On the nuclear chart large empty regions remain unexplored. They are located on the neutron-rich side of the valley. The investigation of this wild land becomes a challenge for experimentalists.
N-rich nuclei of intermediate masses are of interest for nuclear physics as well as for astrophysics. Collective effects due to large asymmetries between proton and neutron numbers can only show up in this region. How the neutrons in excess are coupled to the core or how they are incorporated in the bulk of the nuclear matter is an open question.
Nuclear properties of neutron-rich isotopes have to be known to reproduce the mass abundance distribution in the solar system resulting from the r-process and to constrain the conditions of the nucleosynthesis. Fission has been the most efficient nuclear process to produce and study neutron rich species of intermediate mass. More than 400 new isotopes were made