Gamma Spectroscopy and Compton Effect

GAMMA SPECTROSCOPY & COMPTON EFFECT SN1038

Exp-1 Detecting Gamma Radiation with a scintillation counter.
Exp-2 Recording and calibrating Gamma Spectrum.
Exp-3 Identifying & determining activity of radioactive samples.
Exp-4 Qualitative observation of the Compton Effect.
Exp-5 Energy calibration.
Exp-6 Detector Energy Resolution.
Exp-7 Pair Production and Annihilation.
Exp-8 Counting Statistics.
Exp-9 Absorption of Gamma radiation.
Exp-10 Multichannel scaling and Half Life.

An external MCA interfacing through the computer USB port.
USB Support
Powerful System Software for Analyzing data.
Connects to a USB port eliminating the need to install cards inside the computer.

Scintillation detector.
Gamma radiation.
Energy resolution.
Multichannel analyser.
Compton effect.

This setup with internal pre-amplifier allows direct connection to scintillation detectors. The bipolar amplifier includes polarity selection and multiple shaping times when using different types of detectors with external pre-amplifiers. Upper and lower level discriminators may be set for rejection of unwanted signals. The high voltage supply is rated to +2048V for use with scintillation or proportional detectors. Optional polarity selection is available for use with detectors requiring negative bias. A pre-amplifier power connector (±12V) is included for use with our model PA-1 external pre-amplifier. A 10µsec fixed conversion ADC allows high throughput with dead-time correction. Input selection for pre-amplifier, amplifier or ADC is controlled through computer. A background buffer is included for storing a spectrum when background subtraction, factional spectrum stripping or overlay is required. Presets include real time, live time and ROI integral. UCS30 may be operated as a multichannel scaler for time correlated studies e.g. half-life decay. A special mossbauer mode is included with MSB output for synchronization of the drive circuit. X-ray mapping may be performed with the optional ROI output. An auto-calibrate mode is provided that automatically sets the HV and amplifier gain to 1 keV/channel using a Cs-137 source.

Contents:

Cat. No.	Item Name	Qty.
UCS30-XK	Universal Computer Spectrometer	1
SPA 38	Scintillation probe with stand	1
RSS 8	Set of 8 gamma sources	1
RAS20	Set of 20 Absorbers	1
LSDISK 50	Lead Shield for radioactive sources	1
USB 6	USB cable	1
LM5	Manual CD	1

Computer Spectrometer Options
UCS301K - 1024 channel.
UCS302K - 2048 channel.
UCS304K - 4096 channel.

Universal Spectrometer UCS30-XK
- SPECIFICATIONS Physical : Pulse height analysis and Multichannel Scaling modes, up to 4096-channels depending on model.
  Data Input : BNC connector multi-function input. On-board relays select internal preamplifier, shaping amplifier or direct to ADC when using external signal processing.
  Gate Input : BNC, open gate. TTL low closes gate to ADC.
  HV Output : MHV connectors. Positive output, (switched positive or negative outputs with HV option). (SHV connectors optional), 0-2048 volts, 1mA maximum current at 1000 volts.
  MCS Input : BNC connector bypasses internal preamp/ amplifier. Accepts positive TTL signal >150nsec., 5MHz maximum rate.
  ROI Output : BNC, generates pulse each time an event occurs in set region of interest.
  MSB Output : TTL output of dwell counter most-significant-bit for synchronizing Mossbauer drive.
  USB : USB type “A” connector.
  Preamplifier : Charge sensitive preamplifier for use with scintillation detectors and PMTs.
  Amplifier : Bipolar shaping amplifier with selectable peaking times of 1, 2, 4 and 8µsec. Coarse and fine gain from x1 to x160.
  Ext. Preamp : DB-9F connector supplies ±12 volts.
  ADC : Fixed conversion 10usec. Conversion gain from 256 to 4096 channels depending on model. Direct input accepts pulse peaking times of 0.5µsec. to 10µsec.
  LLD & ULD : Independently computer controlled discriminators over entire input range.
  Modes : MCA for pulse height analysis, MCS for half-life decay or other time related studies and Mossbauer mode.
  Timers : Real-time1sec. increments for PHA, or dwell times from 10-60 msec. per channel in MCS mode. In Mossbauer mode, 100-500usec.
  Memory : Up to 4096 channels x 3 Bytes for data, plus region-of-interest flag.
  Dead time : System dead time is computed.
Scintillation Probe With Stand SPA38
- SPECIFICATIONS Scintillation detector : 38x38mm2 NaI(Tl) crystal with with voltage divider.
  Resolution : 7% @ 662 keV.
  Stand : 10 position stand with sample tray
  BNC cable : BNC6 and MHV6 cable.

Set of 8 Gamma Sources RSS 8

SPECIFICATIONS

Isotope	Activity	Half-life	Emissions	Energies (keV)
Ba133	1uCi.	10.7yrs	Gamma	81.0, 276.3, 303.7, 355.9, 383.7
Cd109	1uCi.	453days	Gamma	88.0
Co57	1uCi.	270days	Gamma	122.1, 136.4
Co60	1uCi.	5.27yrs	Gamma β	1173.2, 1332.5, β317.9
Cs137	1uCi.	30.1yrs	Gamma β	32, 661.6, β511.6, β1173.2
Mn54	1uCi.	312days	Gamma β	834.8, β542.2
Na22	1uCi.	2.6yrs	Gamma	1274.5, 511
Cs/Zn	1uCi.	Mixed	"Unknown"	32, 661.6, 1115.5

* Additionally Required
Computer (not supplied with the setup).
Isotope generator for half life experiment.

* Note
RAS20 is required only for Exp-9.
Isotope generator is required only for Exp-10.

GAMMA SPECTROSCOPY & COMPTON EFFECT SN1038

Atomic & Nuclear Physics Experiments

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