HPGe Analysis

General Overview
This pages is intended as a guide to help users to analyse data from the HPGe array at TAMU.

Doppler Correction
Formula, method used, new resolutions

Add-Back
method, type of add back, new efficiencies

Other
(defective cores, segments.. etc..)

Calibration
calibration coeff file, resolutions etc..

Angular Correlation (Simulation)
A simple Monte-Carlo simulation of two consecutive events hitting the wall of a rectangular box was made to estimate The number of correlated gammas in the cascade of Co-60. The source is placed in the centre at (0,0,0) an the events are simply The intersection between the 3D-line of the events and the plane of the detector. The sides of the box represents the planes of detectors and are placed at different positions perpendicular to the Cartesian axes: Figure 1 shows one such scenario taking into account the full clover detector (clover add-back scheme). Figure 2 shows another scenario taking into account only one core (singles). First particle A is generated and then particle B is generated with respect to A following this law of correlation: W(\theta) = 1 +  A22*L2  +  A44*L4; Where,
 * Detector 1 at x = (50+10.5) mm
 * Detector 2 at y = (50+15.3) mm
 * Detector 3 at x = -(50+6.3) mm
 * Detector 4 at y = -(50+11.5) mm
 * A22 = 0.1005
 * A44 = 0.0094
 * L2 = (1/2)*( 3*cos(\theta)^2 - 1 );   // Legendre polynomial order 2
 * L4 = (1/8)*( 35*cos(\theta)^4 - 30*cos(\theta)^2 + 3 ); // Legendre polynomial order 4

The detector shape is described accurately on the surface of every plane. No other efficiency other than geometrical (such as detection efficiency depending on energy) are taken into account The table below shows the correlation, for 10000000 events emitted.