The only programme which uses physically derived peak shape functions for the deconvolution of alpha spectra from silicon semiconductor and gridded ionisation chamber detectors

ALPS for Windows for the reliable quantitative analysis of:
  - extremely complex alpha spectra
  - alpha spectra with very poor statistics
  - alpha spectra from thick samples

• Runs with all INTEL CPUs, under DOS and under 32-bit WINDOWS
• Available in german, english and french
• Reads spectra from all multichannel analyzers
• For spectra from semiconductor (PIPS, Ultra, ...) of GIC detectors
• Extensive libraries with all nuclides with T_1/2 > 1 second plus daughters
• Efficiency calculation including spiking with tracer nuclides
• Detailed graphics of peakfits, including baseline
• Demo version available as download on request

 below: Sections of a spectrum from a Ra-224 (+ a little Ra-225) source

Sections of the analysis printout from ALPS

Spectrum testspec.dat read in;  Length= 1024 channels
A L P S - Demo
A L P S ::::      Version (04.01)
Spectrum: testspec.dat     14. 8. 1997  18:14:43
Channel  20 to 1021       Sens.= 20.
TAIL 1 NOBA 0  GIC 0 SMOO 0 FOLD 0 FIXP 0 0 ADDI 0 AREA 0
Test with spectrum TESTSPEC.DAT (Ra-224 + a bit Ra-225)      =========================================================
# Position Energy DE   Area  DA(%) FWHM/keV FIT Height   DH Q
 1__212.8_____5444.1_±__0.3_____90499.9_____2.9___18.11_____.38___15278.8 ±___425.3 

 2__250.0_____5598.9_±__2.1______4828.0____18.3___18.11_____.38_____815.1 ±___157.1 

 3__269.9_____5681.7_±__0.2___1693644.0_____2.7___18.11_____.38__285931.7 ±__7431.2 

 4__285.7_____5747.3_±__2.4______3674.3____21.3___18.11_____.38_____620.3 ±___139.6 

 5__290.0_____5765.4_±__1.5______7138.2____14.1___18.11_____.38____1205.1 ±___179.9 

 6__304.3_____5824.9_±__4.4_______383.9____48.8___18.11_____.38______64.8 ±____32.8 

 7__314.0_____5865.3_±_16.6________55.0___176.7__22.88_____1.17 ______5.6 ±_____5.6 ?

 8__357.5_____6046.4_±__1.6____375038.5____12.9___20.29_____.97___48441.6 ±___6670.3
etc...

Peak Assignments:
=================
Library : demo.lib                             
Sample mass = 1000.00 grams measured = 6000. seconds

RA-224 : Energy  E-Lit. I à/%  Bq/kg
              5681.7 5685.6 94.98  111.4±  3.0   
              5444.1 5444.6 05.00  113.1±  3.2 +   
          ===============================================
Average activity from all lines  (2) 112.2± 2.2
Average activity from clear lines (1) 113.1± 3.2
Added activity from 2 lines      111.5± 2.9

RN-220 : Energy  E-Lit. I à/%   Bq/kg
              6284.6 6288.3  99.90  68.7±  3.8 +   
          ===============================================
Average activity from all lines  (1) 68.7± 3.8

etc...

Nuclides in the sample :
========================

RA-224    1.1153E+02   2.8746E+00 Bq/kg
RN-220    6.8742E+01   3.8186E+00 Bq/kg
PO-216    6.7724E+01   1.5442E+00 Bq/kg
BI-212    9.2504E+01   9.6807E+00 Bq/kg
PO-212    5.8146E+01   2.9099E+00 Bq/kg
AC-225    4.6496E-02   2.2705E-02 Bq/kg
AT-217    6.2420E-02   2.8935E-02 Bq/kg
BI-213    1.7198E-01   3.0397E-01 Bq/kg
PO-213    6.0908E-02   1.2759E-02 Bq/kg

ATTENTION !!! Activities are not corrected for EFFICIENCY !!!!!

ALPS for Windows complete with new features
for easy handling in the Windows environment is now available

A NEW CONCEPT:
 The capabilities of Gamma-W and Sodigam and ALPS in ONE software package
Call us

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