scholarly journals Neutron-induced fission fragment angular distributions, anisotropy, and linear momentum transfer measured with the NIFFTE fission time projection chamber

2020 ◽  
Vol 102 (1) ◽  
Author(s):  
D. Hensle ◽  
J. T. Barker ◽  
J. S. Barrett ◽  
N. S. Bowden ◽  
K. J. Brewster ◽  
...  
Keyword(s):  
Momentum Transfer ◽  
Fission Fragment ◽  
Time Projection Chamber ◽  
Linear Momentum ◽  
Angular Distributions ◽  
Induced Fission ◽  
Time Projection

Remark on a promising design of the fissionTPC cathode

2021 ◽  
Vol 16 (12) ◽  
pp. T12004
Author(s):  
J.Q. Fu
Keyword(s):  
Cross Section ◽  
Fission Fragment ◽  
Rise Time ◽  
Time Projection Chamber ◽  
Signal To Noise Ratio ◽  
Short Note ◽  
Signal To Noise ◽  
Cathode Structure ◽  
Induced Fission ◽  
Time Projection

Abstract The fission Time Projection Chamber (fissionTPC) has been designed and built to make precision cross-section measurements of neutron-induced fission by the NIFFTE Collaboration. The signal of the cathode is implemented as trigger for the fissionTPC that rejects alpha signal as background and selects only fission fragment signal to be recorded. This short note is devoted to a discussion of a promising way to improve the cathode signal performance by segmenting the planar cathode into two parts. It is shown through analytic calculations that the new cathode structure has better signal-to-noise ratio and faster rise time.

scholarly journals Fission fragment angular anisotropy in neutron-induced fission of U235 measured with a time projection chamber

2019 ◽  
Vol 99 (6) ◽  
Author(s):  
V. Geppert-Kleinrath ◽  
F. Tovesson ◽  
J. S. Barrett ◽  
N. S. Bowden ◽  
J. Bundgaard ◽  
...  
Keyword(s):  
Fission Fragment ◽  
Time Projection Chamber ◽  
Angular Anisotropy ◽  
Induced Fission ◽  
Time Projection

scholarly journals Precision measurements on oxygen formation in stellar helium burning with gamma-ray beams and a Time Projection Chamber

2021 ◽  
Author(s):  
Robin Smith ◽  
Moshe Gai ◽  
Sarah Stern ◽  
Deran Schweitzer ◽  
Mohammad Ahmed
Keyword(s):  
Time Projection Chamber ◽  
Gamma Ray ◽  
Nuclear Reactions ◽  
Angular Distributions ◽  
Helium Burning ◽  
Low Energies ◽  
Important Input ◽  
Novel Method ◽  
Time Projection ◽  
First Time

Abstract Stellar Evolution theory relies on our knowledge of nuclear reactions, with the carbon/oxygen (C/O) ratio, at the end of helium burning, being the single most important input. However, the C/O ratio is still not known with sufficient accuracy, due to large uncertainties in the cross section for the fusion of helium with 12C to form 16O, denoted as the 12C(α,γ)16O reaction. We present initial results at moderately low energies using a novel method, which is significantly different from the experimental efforts of the past four decades. Precise angular distributions of the 12C(α,γ)16O reaction were obtained by measuring the inverse 16O(γ,α)12C reaction with gamma-beams and a Time Projection Chamber detector. These allowed us to measure, for the first time, the interference angle of the l = 1 and 2 partial waves contributing to this reaction (φ12), which agrees with predictions based on the unitarity of the scattering matrix.

Projectile-breakup-induced fission-fragment angular distributions in the Li6+Th232 reaction

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
A. Pal ◽  
S. Santra ◽  
D. Chattopadhyay ◽  
A. Kundu ◽  
K. Ramachandran ◽  
...  
Keyword(s):  
Fission Fragment ◽  
Angular Distributions ◽  
Induced Fission

Fission fragment-light particle coincidences and linear momentum transfer

1986 ◽  
Vol 457 (1) ◽  
pp. 146-172 ◽  
Author(s):  
Y. Patin ◽  
S. Leray ◽  
E. Tomasi ◽  
O. Granier ◽  
C. Cerruti ◽  
...  
Keyword(s):  
Momentum Transfer ◽  
Fission Fragment ◽  
Linear Momentum ◽  
Light Particle

scholarly journals Precision measurements on oxygen formation in stellar helium burning with gamma-ray beams and a Time Projection Chamber

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
R. Smith ◽  
M. Gai ◽  
S. R. Stern ◽  
D. K. Schweitzer ◽  
M. W. Ahmed
Keyword(s):  
Cross Section ◽  
Time Projection Chamber ◽  
Gamma Ray ◽  
Reaction Cross ◽  
Total Reaction Cross Section ◽  
Angular Distributions ◽  
Helium Burning ◽  
The Past ◽  
Time Projection

AbstractThe carbon/oxygen (C/O) ratio at the end of stellar helium burning is the single most important nuclear input to stellar evolution theory. However, it is not known with sufficient accuracy, due to large uncertainties in the cross-section for the fusion of helium with 12C to form 16O, denoted as 12C(α, γ)16O. Here we present results based on a method that is significantly different from the experimental efforts of the past four decades. With data measured inside one detector and with vanishingly small background, angular distributions of the 12C(α, γ)16O reaction were obtained by measuring the inverse 16O(γ, α)12C reaction with gamma-beams and a Time Projection Chamber (TPC) detector. We agree with current world data for the total reaction cross-section and further evidence the strength of our method with accurate angular distributions measured over the 1− resonance at Ecm ~ 2.4 MeV. Our technique promises to yield results that will surpass the quality of the currently available data.

Fission Fragment Angular Distributions in Charged-Particle-Induced Fission ofRa226

1964 ◽  
Vol 136 (5B) ◽  
pp. B1333-B1344 ◽  
Author(s):  
J. E. Gindler ◽  
G. L. Bate ◽  
J. R. Huizenga
Keyword(s):  
Charged Particle ◽  
Fission Fragment ◽  
Angular Distributions ◽  
Induced Fission
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