The Los Alamos Neutron Science Center

Lisowski, P.W.; Schoenberg, Kurt F.

doi:10.1016/j.nima.2006.02.178

Cited by 229 publications

(136 citation statements)

References 2 publications

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“…The Los Alamos Neutron Science Center (LANSCE) [1] is a powerful neutron source that allows us to study nuclear reaction from thermal energies up to several hundreds of MeV. Fission fragment properties are currently studied using three different instruments: a fission fragment timeof-flight and kinetic energy spectrometer (SPIDER), a Time Projection Chamber (TPC), and a double Frisch grid ionization chamber.…”

Section: Experimental Methodsmentioning

confidence: 99%

Studies of fission fragment properties at the Los Alamos Neutron Science Center (LANSCE)

et al. 2017

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Abstract. Nuclear data related to the fission process are needed for a wide variety of research areas, including fundamental science, nuclear energy and non-proliferation. While some of the relevant data have been measured to the required accuracies there are still many aspects of fission that need further investigation. One such aspect is how Total Kinetic Energy (TKE), fragment yields, angular distributions and other fission observables depend on excitation energy of the fissioning system. Another question is the correlation between mass, charge and energy of fission fragments. At the Los Alamos Neutron Science Center (LANSCE) we are studying neutron-induced fission at incident energies from thermal up to hundreds of MeV using the Lujan Center and Weapons Neutron Research (WNR) facilities. Advanced instruments such as SPIDER (timeof-flight and kinetic energy spectrometer), the NIFFTE Time Projection Chamber (TPC), and Frisch grid Ionization Chambers (FGIC) are used to investigate the properties of fission fragments, and some important results for the major actinides have been obtained.

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Section: Experimental Methodsmentioning

confidence: 99%

Studies of fission fragment properties at the Los Alamos Neutron Science Center (LANSCE)

et al. 2017

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“…A four-day long neutron-capture experiment on 97 Mo was performed at neutron flight path 14 at LANSCE [14,15]. Spallation neutrons were produced by irradiation of a tungsten target with 800-MeV protons with a repetition rate of 20 Hz.…”

Section: Experiments and Data Processing A Experimental Detailsmentioning

confidence: 99%

“…The measurement was undertaken with the DANCE system [12,13] installed at a beam of the Lujan Neutron Scattering Center at the Los Alamos Neutron Science Center (LANSCE) [14,15]. Results of our analysis of these spectra with the statistical model are presented in this paper.…”

Section: Introductionmentioning

confidence: 99%

Measurement of theMo97(n,γ)reaction with the DANCEγcalorimeter array

et al. 2015

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Spectra of γ rays following the 97 Mo(n, γ) reaction were measured as a function of incident neutron energy with the DANCE (Detector for Advanced Neutron Capture Experiments) array of 160 BaF2 scintillation detectors at the Los Alamos Neutron Science Center using an enriched 97 Mo target. These spectra were used for the assignment of spins of the 97 Mo resonances up to neutron energy En = 1.7 keV, as well as in the study of photon strength functions (PSFs) in 98 Mo. Analysis of the spectra with the nuclear statistical model showed that they can be well reproduced with the same PSF models which well described the γ decay following slow neutron capture in 95 Mo. On the other hand, the spectra are inconsistent with PSFs describing some other experimental data in 98 Mo.

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“…The measurement was performed using the highly segmented Detector for Advanced Neutron Capture Experiments (DANCE) detector array [1,2] installed at the pulsed neutron beam at the Los Alamos Neutron Science Center (LANSCE) at Los Alamos National Laboratory [3] which produces a white spectrum of neutrons with energies from subthermal up to several MeV with the repetition rate of 20 Hz. These neutrons are sent to flight path 14 at the Manuel Lujan Jr. Neutron Scattering Center.…”

Section: Dance Experimentsmentioning

confidence: 99%

Photon strength functions in Gd isotopes studied from radiative capture of resonance neutrons

Kroll

Baramsai

Mitchell

et al. 2014

EPJ Web of Conferences

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Abstract. The experimental spectra of γ rays following radiative neutron capture on isolated resonances of stable 152,154−158 Gd targets were measured by the DANCE calorimeter installed at the Los Alamos Neutron Scattering Center in New Mexico, USA. These spectra were analyzed within the extreme statistical model to get new information on the photon strength functions. Special emphasis was put on study of the scissors vibrational mode present in these isotopes. Our data show that the scissors-mode resonances are built not only on the ground states but also on the excited levels of all studied Gd isotopes. The scissors mode strength observed in 157,159 Gd products is significantly higher than in neighboring even-even nuclei 156,158 Gd. Such a difference indicates the existence of an odd-even effect in the scissors mode strength. Moreover, there exists no universal parameter-free model of the electric dipole photon strength function describing the experimental data in all of the Gd isotopes studied. The results for the scissors mode are compared with the (γ, γ ) data for the ground-state transitions and with the results from 3 He-induced reactions.

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The Los Alamos Neutron Science Center

Cited by 229 publications

References 2 publications

Studies of fission fragment properties at the Los Alamos Neutron Science Center (LANSCE)

Studies of fission fragment properties at the Los Alamos Neutron Science Center (LANSCE)

Measurement of theMo97(n,γ)reaction with the DANCEγcalorimeter array

Photon strength functions in Gd isotopes studied from radiative capture of resonance neutrons

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