by Adrian Antonio Valverde Precision measurements in Nuclear Physics are an area of active study, serving as an important avenue of research for a wide variety of subfields. In this dissertation, three cases will be presented. First, the precision determination of the Ft value in T = 1/2 mixed mirror transitions is discussed. These provide a method of determining the Vud element of the Cabbibo-Kobayashi-Masakawa matrix, and serve as an important test of its unitarity and of the electroweak sector of the Standard Model. C, as the lightest such β decay, is particularly sensitive to physics beyond the Standard Model. Thus, a new, high-precision half-life measurement was conducted using the TwinSol facility at the Nuclear Science Laboratory at the University of Notre Dame. The new half-life, t1/2 = 1220.27(26) s, is consistent with the previous values but significantly more precise, and the new world-average value is t 1/2 = 1220.41(32), a fivefold improvement over the previous value. This makes the C Ftmirror value the most precise of all superallowed mixed mirror values, and provides a strong impetus to the measurement of the Fermi-to-Gamow-Teller mixing ratio for the decay of C and thus allow the determination of Vud. Second, the Penning trap mass measurement of Cu using the LEBIT 9.4 T Penning trap mass spectrometer at the National Superconducting Cyclotron Laboratory at Michigan State University is presented. This mass is important for calculating reaction rates Adrian Antonio Valverde and constraining the Ni(p,γ)Cu(p,γ)Zn(β)Cu bypass of the Ni rp-process waiting point. Previous recommended mass excesses had disagreed by several hundred keV; our new measurement, ME= −38626.7(7.1) keV, resolves this discrepancy. The new calculated Ni(p,γ) and Cu(p,γ) forward and reverse rates were used to perform precision network calculations, which show the rp-process flow partially redirecting around the Ni waiting point. Finally, a new facility is under development at the Argonne Tandem Linac Accelerator System to allow for precision measurements necessary for the determination of the r-process path around the N = 126 shell closure. The construction and commissioning of an important component of the N = 126 factory, the radiofrequency quadrupole cooler-buncher, will be presented.

Precision Measurements to Test the Standard Model and for Explosive Nuclear Astrophysics

The new generation of nuclear facilities calls for new technological developments to produce,
accelerate, manipulate and analyse exotic nuclei. The main topic of this thesis work was the
simulation, design and test of a Multi-Reflection Time-of-Flight Mass spectrometer (MR-ToFMS)
for fast mass separation and fast mass measurement of radioactive ions in the installations S3
and DESIR at SPIRAL2. Such a device could separate isobaric nuclei and provide SPIRAL2 with
high purity beams. Also, its mass measurement capabilities would help to determine binding
energies of exotic and superheavy nuclei with a high precision. This apparatus has been simulated
with the SIMION 8.1 software and designed accordingly. First offline tests have been performed
with a stable ion source at LPC Caen. In addition a low-aberration electrostatic deflector has been
simulated and designed to operate with this MR-ToF-MS without spoiling its performances. This
work also describes the analysis and results of the first online tests of a FEBIAD-type ion source
intended to provide SPIRAL1 and SPIRAL2 radioactive beams of competitive intensities. Finally,
we describe the analysis of a nuclear physics experiment, including the calibration of the different
detectors and the gamma-spectroscopy of nuclei in the vicinity of the doubly magic 100Sn.

Design, simulations and test of a Time-of-Flight spectrometer for mass measurement of exotic beams from SPIRAL1/SPIRAL2 and γ-ray spectroscopy of N=Z nuclei close to $^{100}$Sn

Background: Measurements of the ft values for T = 1/2 mirror β + decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix.Inmostmirrordecaysusedforthesetests,uncertaintiesinthe ft valuesaredominatedbytheuncertainties in the half-lives. Purpose: Two precision half-life measurements were performed for the T = 1/2 β + emitters, 17 Fa nd 33 Cl, in order to eliminate the half-life as the leading source of uncertainty in their ft values. Method: Half-lives of 17 Fa nd 33 Cl were determined using β counting of implanted radioactive ion beam

High-precision half-life measurements of the T = 1/ 2m irrorβ decays 17 Fa nd 33 Cl

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

R. Frigot

Author Tools

Chat about Author

Papers

High-precision half-life measurements of the T = 1/ 2m irrorβ decays 17 Fa nd 33 Cl