Models Vs Resonance amp spectra 

Isoflex certificates for enriched silicon samples

Au and Si29 runs normalised by proton number show consistency (dedicated pulses, example detector 4). Plots for tof spectra zooming on one resonance and histogram of counts in this resonance divided by protons with statistical errors.

Plots were produced with the macros attached.

Sample information Excel sheet attached below.

Images 1-6: Si-29 sample

Images 6-10: Si-28 sample

Image 11: screenshot from Excel sheet for Si-29

Image 12: screenshot from Excel sheet for Si-28

Image 13: screenshot from Excel sheet for Dummy

Both samples were only able to be weighed inside the capsule as they were very crumbly and unable to be weighed alone (see images). The capsule was weighed before the sample was put in it and thus the mass of Si can be found by subtracting the capsule mass from the measured mass.

Average mass Si-29: 0.8568g pm 0.0002

Average mass Si-28: 0.9551 pm 0.0002

Average mass Dummy: 0.0765 pm 0.0001

https://docs.google.com/spreadsheets/d/18lk27N6Pb2iT_xtDA-1T1c9vVubXTJ0OsaDjOxErP0I/edit?usp=sharing

Campaign started yesterday. C6D6s placed at 9 cm distance, angle 125 degrees w.r.t beamline.

Measured calibration sources: Cs137, Y88, AmBe, CmC. Measuring Si-nat over the weekend.

Detector          Voltage

Updated plots with new WFs. Rebinned by 10.

Plots made with new weighting functions. All rebinned by 10.

Attatchments 1-4: Detector 1.

Attatchments 5-8: Detector 2.

Attatchments 9-12: Detector 3.

Updated plots for Zn and Au

Plots for Zn and Au with Empty subtracted, and compared to weighted spectra.

Note: Au are logged x and y, Zn is only logged x.

Here are all the files needed for calculation of the yield. There is some information that still needs to be added to the energyandyield.c file, for example the atomic mass of your target in amu, the neutron separation energy for the compound nucleus in MeV (this is needed due to using the Weighting technique). Also, you need to add some lines  to read the tof histogram, which will then be converted in a neutron energy hisogram and then divided by the flux.

For the conversion to neutron energy we assume an approximate flight path for now. We will determine this more accurately once we have the yields and fit resonances. Emma will need to use a different flux than Annie, because we have a different spallation target. Emma's flux is preliminary, so we also should look at the SILI detectors at some point.

There are some more instances where names for rootfiles and ascii files need to be added. In the first instance, please try and add the missing information and try running the code. I haven't tested it so there may be still problem.  To run it you will need to download the 3 rootfiles into the same folder (or move somewhere else and adjust the path name in the .c file.

PLEASE set variable THRESHSCALER to 1 for now. We dont know yet what it is :-)

Below are graphs for the comparison between background corrected and uncorrected spectra (weighted) for Si-30, Au20, Au22 and Sinatgood.

This is just for C6D6 detector 1 but all detectors are consisitent. All histograms have been rebinned by 100 for clarity. 

Below are graphs for each sample (weighted) showing the comparison between ambient spectra, empty/dummy holder and sample spectra. 

All four detectors are shown for each sample (Si-30, Au20, Au22, Sinatgood). 

All histograms have been rebinned by 50. 

Below are histograms for the weighted spectra (with deadtime correction) with and without ambient for C6D6 detector 1.

For each sample the histogram with ambient is first and then without ambient (please ignore histogram titles). 

The Dummy, Empty and C-nat have been rebined by combining 100 to 1.

The Au20, Au22, Si-30 and Sinatgood have been rebined by combining 10 to 1.

Si-30 WF used for: Si-30, Dummy, Empty, C-nat

Au20 WF used for: Au20

Au22 WF used for: Au22

Sinatgood WF used for: Sinatgood

Si-30:

Histograms for deadtime correction for all 4 C6D6 detectors for parasitic beam.

Histograms for weighted and deadtime corrected parasitic spectra. 

Si-30:

Histograms for dead time corrections for all 4 C6D6 detectors.

Histograms for weighted and deadtime corrected dedicated spectra.