Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei

Padgett, Stephen; Wang, Tzu-Fang

doi:10.1016/j.nima.2014.10.039

Title: Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei

Authors:: Padgett, Stephen; Wang, Tzu-Fang

Publication Date:: Thu Jan 01 00:00:00 EST 2015

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

OSTI Identifier:: 1245669

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

Additional Journal Information:: Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Volume: 770 Journal Issue: C; Journal ID: ISSN 0168-9002

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Citation Formats


                    Padgett, Stephen, and Wang, Tzu-Fang. Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei.  Netherlands: N. p., 2015. 
Web.  doi:10.1016/j.nima.2014.10.039.

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                    Padgett, Stephen, & Wang, Tzu-Fang. Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei.  Netherlands.  https://doi.org/10.1016/j.nima.2014.10.039

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                    Padgett, Stephen, and Wang, Tzu-Fang. Thu .  
"Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei".  Netherlands.  https://doi.org/10.1016/j.nima.2014.10.039.

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@article{osti_1245669,

  title        = {Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei},

  author       = {Padgett, Stephen and Wang, Tzu-Fang},

  abstractNote = {},

  doi          = {10.1016/j.nima.2014.10.039},

  journal      = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},

  number       = C,

  volume       = 770,

  place        = {Netherlands},

  year         = {Thu Jan 01 00:00:00 EST 2015},

  month        = {Thu Jan 01 00:00:00 EST 2015}

}

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Works referenced in this record:

Geant4—a simulation toolkit
journal, July 2003

Agostinelli, S.; Allison, J.; Amako, K.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
DOI: 10.1016/S0168-9002(03)01368-8

The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve
journal, October 2003

Helmer, R. G.; Hardy, J. C.; Iacob, V. E.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 511, Issue 3
DOI: 10.1016/S0168-9002(03)01942-9

On Directional Correlation of Successive Quanta
journal, July 1940

Hamilton, Donald R.
Physical Review, Vol. 58, Issue 2
DOI: 10.1103/PhysRev.58.122

The low-lying levels of ¹⁴⁷ Pm
journal, October 1977

Al-Janabi, T.; Hamilton, W. D.; Warner, D. D.
Journal of Physics G: Nuclear Physics, Vol. 3, Issue 10
DOI: 10.1088/0305-4616/3/10/015

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Title: Simulating γ–γ coincidences of β-delayed γ-rays from fission product nuclei

Citation Formats

Geant4—a simulation toolkit journal, July 2003

The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve journal, October 2003

On Directional Correlation of Successive Quanta journal, July 1940

The low-lying levels of 147 Pm journal, October 1977

Geant4—a simulation toolkit
journal, July 2003

The use of Monte Carlo calculations in the determination of a Ge detector efficiency curve
journal, October 2003

On Directional Correlation of Successive Quanta
journal, July 1940

The low-lying levels of ¹⁴⁷ Pm
journal, October 1977