Direct mass measurements in the light neutron-rich region using a combined energy and time-of-flight technique
This experiment has demonstrated that direct mass measurements can be performed (albeit of low precision in this first attempt) using the M proportional to ET/sup 2/ method. This technique has the advantage that many particle-bound nuclei, produced in fragmentation reactions can be measured simultaneously, independent of their N or Z. The main disadvantage of this approach is that both energy and time-of-flight must be measured precisely on an absolute scale. Although some mass walk with N and Z was observed in this experiment, these uncertainties were largely removed by extrapolating the smooth dependence observed for known nuclei which lie closer to the valley of ..beta..-stability. Mass measurements for several neutron-rich light nuclei ranging from /sup 17/C to /sup 26/Ne have been performed. In all cases these measurements agree with the latest mass compilation of Wapstra and Audi. The masses of /sup 20/N and /sup 24/F have been determined for the first time.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Oregon State Univ., Corvallis (USA). Dept. of Physics
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5597328
- Report Number(s):
- LA-UR-85-1923; CONF-850507-40; ON: DE85012758
- Resource Relation:
- Journal Volume: 96; Journal Issue: 1-4; Conference: International conference on nuclear data for basic and applied science, Santa Fe, NM, USA, 13 May 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MASS NUMBER
MEASURING METHODS
CARBON 17
CARBON 18
ENERGY BALANCE
EXPERIMENTAL DATA
FLUORINE 23
FLUORINE 24
NEON 25
NEON 26
NITROGEN 19
NITROGEN 20
OXYGEN 21
OXYGEN 22
TIME-OF-FLIGHT METHOD
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON ISOTOPES
DATA
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUORINE ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
NEON ISOTOPES
NITROGEN ISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
651321* - Nuclear Properties & Reactions
A=6-19
Experimental- Mass
Abundance
& Binding Energy- (-1987)
651421 - Nuclear Properties & Reactions
A=20-38
Experimental- Mass
Abundance
& Binding Energy- (-1987)