nuclear

Optimizing muon decay measurements

Students Muzammil Abbasi
Time Frame Summer 2018
Supplementary Materials Accurate determination of muon lifetimes
Description

Muzamil Abbasi is a final year undergraduate at the Habib University, Karachi. Working with the Physlab team, Umar Hasan and Dr. Sabieh Anwar, he has optimized the existing experiment aimed at measuring muon lifetimes. He has noticed nonlinearities (integral and differential nonlinearities) in the operation of the multi-channel analyzer that is systematically affecting the lifetime measurements. A scheme was devised using a pulse and delay generator to characterize these nonlinearities and then deconvolving this response from the measurements. The result is a more accurate determination of the muon lifetime. Muzamil Abbasi continues to work on this project as part of his research dissertation.

 

DETAIL

Radioactivity: Effect of Absorbers

Student Manual

Natural radioactivity usually results from nuclear reactions. In radioactivity, some heavier nuclei spontaneously transform into different nuclides. This results in emission of one or more kinds of radiations such as alpha, beta and gamma rays. Out of these gamma rays are short wavelength electromagnetic waves, hence uncharged and highly penetrating inside matter. The purpose of this task is to find the penetration of γ rays through lead or aluminum sheets. We will be using Co-60 as the γ ray source.

Sample Results sample results
Experiment Code 1.10A
Version 8 December 2015-2015-v1

Further Readings and References

No references found

Pictorial Procedure

DETAIL

Measuring Muon Lifetime

Student Manual

In this experiment, we will measure the lifetime of cosmic ray muons using high-speed electronics such as Nuclear Instrumentation Modules (NIM), Time-to-Amplitude Convertor, Multi-Channel Analyzer and Picoscope.

Sample Results The histogram obtained for the muon lifetime experiment using ROOT.
Raw data with the fitted exponential curve in MATLAB.
Amptek DppMCA software interface.
Experiment Code 2.20
Version 30 November 2014

Further Readings and References


Pictorial Procedure

NIMmoduleCascadeMuoncircuit

DETAIL

Gamma-ray spectroscopy

Student Manual

In this experiment, we will analyse energy spectrums of Cobalt-60 and background radiation and calculate the mass absorption coefficient for lead. Also the different ways in which gamma ray photons interact will be studied.

Sample Results A calibrated Cobalt-60 spectrum for a voltage of 800 V and for a coarse gain value of 4.
A calibrated energy spectrum of background radiation taken at 750 V and a coarse gain value of 8 built over a time interval of around 80 hrs.
Mass absorption coefficient is the p1 parameter in this case.The graph is of ln(I/I_o) vs thickness using Co-60 peak with E=1.33 MeV.
Hardware Manual ORTEC gamma ray spectroscopy manual
Experiment Code 2.19
Version 4 November 2014

Further Readings and References


Pictorial Procedure

Gamma2Gamma3Gamma1

DETAIL

Energy dispersive X-ray fluorescence

Student Manual

Energy dispersive X-ray fluorescence spectrometry is used to analyze a sample’s elemental composition. Using the energies of characteristic X-rays, Moseley’s Law will be verfied which is a direct evidence for the existence of Atomic number.

Sample Results EDXRF raw spectrum for stainless steel sample
ROIs for the elements of stainless steel and their detail in ADMCA
Processed spectrum for stainless steel sample
Concentration analysis table in XRS-FP
Moseley’s Law
Moseley’s Law Plot taken on 7 June 2016
Hardware Manual Amptek’s EDXRF
Mini-X, X-ray tube
XR100CR X-ray detector
PX4
XRF-XRS-FP software guide
Experiment Code 2.14
Version 25 August 2015, 2015-v1

Further Readings and References


Pictorial Procedure

ApparatusBremsstrahlungSchemeofsoftwaresX-rayproductionnewX-raytubeEDXRFspectrum

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