Beta Decay Far from Stability and Its Role in Nuclear Physics and Astrophysics

Klapdor, H. V.

doi:10.1002/prop.2190330102

Cited by 23 publications

(5 citation statements)

References 138 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measurement of ν spectra from reactors, correlated with β spectra, is currently developing as a technique of monitoring nuclear facilities and would enable direct access to the amount of fissile material produced for military use [10]. The β decays are also known to play an important role in astrophysics, e.g., for the r process, in cosmochronology or for galatic neutrinos [11]. In elementary particle physics, measured ν spectra could highlight possible physics beyond the standard model leading to a hypothetical fourth neutrino coupled only to the gravity field [12].…”

Section: Introductionmentioning

confidence: 99%

Reliability of usual assumptions in the calculation ofβandνspectra

Mougeot

2015

Phys. Rev. C

113

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Reliability of usual assumptions in the calculation ofβandνspectra

Mougeot

2015

Phys. Rev. C

113

View full text Add to dashboard Cite

“…where S p (n) is the number of pile-ups in channel 'n', S(j ) is the counting rate in the j th channel of the experimental spectrum and K is the maximum channel of the spectrum. The high-energy region of the spectrum near Q EC was used to determine the 'constant' in equation (6). Actually, the amplitude A 1+2 depends on the time between the nuclear decays and varies from A 1 , A 2 to A 1 + A 2 , which results in a spread-out shape of the pile-up spectrum in the low-energy region (where pile-ups are less than 1% of the experimental spectrum) while in the high-energy region (near Q EC ) the shape of the pile-up spectrum remains practically unchanged.…”

Section: Data Processingmentioning

confidence: 99%

“…Information on the 0954-3899/98/040831+15$19.50 c 1998 IOP Publishing Ltd structure of S β (E) is important for different fields of nuclear physics. Prediction of nuclear half-lives [4], analysis of delayed processes [5], analysis of element yields in astrophysical processes [6], in thermonuclear processes [7], in cosmochronology [8], and in technological calculations [5,8] require knowledge of the structure of strength functions for β-transitions.…”

Section: Introductionmentioning

confidence: 99%

Structure of the (EC) decay strength function of Tb ( h)

Izosimov

Kalinnikov

Myakushin

et al. 1998

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

The strength function S β (E) for the β + (EC)-decay of 147g Tb (T 1/2 1.6 h) is measured by the method of total γ -rays absorption. The same strength function is deduced from the analysis of the 147g Tb decay scheme and 147 Gd level scheme. The thus derived strength functions are in quite good agreement with each other. Also, theoretical calculation of S β (E) by the microscopic quasiparticle-phonon model is carried out. The most characteristic properties of both the experimental and theoretical strength functions are pronounced resonances in S β (E).

show abstract

“…Additionally, the integrated spectrum shape value is an essential ingredient in astrophysical research such as the r-process [42,43,44]. Here, typically only the Fermi function is included when calculating the Gamow-Teller strength function.…”

Section: Applicationsmentioning

confidence: 99%

Beta Spectrum Generator: High precision allowed β spectrum shapes

Hayen

Severijns

2019

Computer Physics Communications

View full text Add to dashboard Cite

Several searches for Beyond Standard Model physics rely on an accurate and highly precise theoretical description of the allowed β spectrum. Following recent theoretical advances, a C++ implementation of an analytical description of the allowed beta spectrum shape was constructed. It implements all known corrections required to give a theoretical description accurate to a few parts in 10 4 . The remaining nuclear structure-sensitive input can optionally be calculated in an extreme single-particle approximation with a variety of nuclear potentials, or obtained through an interface with more state-of-the-art computations. Due to its relevance in modern neutrino physics, the corresponding (anti)neutrino spectra are readily available with appropriate radiative corrections. In the interest of user-friendliness, a graphical interface was developed in Python with a coupling to a variety of nuclear databases. We present several test cases and illustrate potential usage of the code. Our work can be used as the foundation for current and future high-precision experiments related to the beta decay process. Source code: https://github.com/leenderthayen/BSG Documentation: http://bsg.readthedocs.io Program summaryProgram Title: BSG Licensing provisions: MIT Programming language: C++ and Python Nature of problem: The theoretical allowed β spectrum contains a large variety of corrections from different areas of physics, each of which is important in certain energy ranges. A high precision description is required for new physics searches throughout the entire nuclear chart. Solution method: We implement the analytical corrections described in recent theoretical work. Nuclear matrix elements in allowed Gamow-Teller β decay are calculated in a spherical harmonic oscillator basis. Wave functions can be calculated in an extreme single-particle approximation using different nuclear potentials, or provided by the user as the output from more sophisticated routines. Corresponding neutrino spectra are calculated with appropriate radiative corrections. A graphical user interface written in Python additionally provides connections to a variety of nuclear databases. CPC Library subprograms used:Catalogue number: ABOV

show abstract

Beta Decay Far from Stability and Its Role in Nuclear Physics and Astrophysics

Cited by 23 publications

References 138 publications

Reliability of usual assumptions in the calculation ofβandνspectra

Reliability of usual assumptions in the calculation ofβandνspectra

Structure of the (EC) decay strength function of Tb ( h)

Beta Spectrum Generator: High precision allowed β spectrum shapes

Contact Info

Product

Resources

About