Prompt neutron emission from the spontaneous fission of sup 260 Md

We have made the first measurement of the number of neutrons emitted from the spontaneous fission of a nuclide in which very high fragment energies dominate the fission process. In bombardments of {sup 254}Es, we produced a large sample of 28-d {sup 260}Md, which was neutron counted in a 1-m-diamete...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 1990-02, Vol.41:2
Main Authors: Wild, J.F., van Aarle, J., Westmeier, W., Lougheed, R.W., Hulet, E.K., Moody, K.J., Dougan, R.J., Koop, E., Glaser, R.E., Brandt, R., Patzelt, P.
Format: Article
Language:English
Subjects:
652020 - Nuclear Properties & Reactions, A=220 & above, Experimental
ACCELERATORS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
BARYONS
CHARGED-PARTICLE REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DECAY
EINSTEINIUM 254 TARGET
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FISSION
FISSION FRAGMENTS
FISSION NEUTRONS
GADOLINIUM
HADRONS
HEAVY ION REACTIONS
HEAVY NUCLEI
INFORMATION
ISOTOPES
KINETIC ENERGY
MASS SPECTRA
MENDELEVIUM 260
MENDELEVIUM ISOTOPES
METALS
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
NEON 22 REACTIONS
NEUTRON EMISSION
NEUTRONS
NUCLEAR DECAY
NUCLEAR FRAGMENTS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
PROMPT NEUTRONS
Q-VALUE
RARE EARTHS
SPECTRA
SPONTANEOUS FISSION
TARGETS
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Description
Summary:We have made the first measurement of the number of neutrons emitted from the spontaneous fission of a nuclide in which very high fragment energies dominate the fission process. In bombardments of {sup 254}Es, we produced a large sample of 28-d {sup 260}Md, which was neutron counted in a 1-m-diameter spherical tank containing a Gd-doped scintillator solution. The average number of neutrons emitted per fission is only 2.58{plus minus}0.11, substantially less than for other actinides. A linear dependence of neutron multiplicity on fragment-excitation energy is observed to the highest values of total kinetic energy.
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.41.640