Study of the alpha energies of Ra-226 with MCA

An alpha-spectrometer, consisting of a silicon surface barrier layer detector, a preamplifier, a pulse height analyser and a recording device for registration of the spectra is calibrated by means of an open alpha-emitter of known alpha-energy (241Am). The energy spectrum of a radium source which is in equilibrium with its decay products, is recorded and evaluated. The alpha-energies found in this way are allocated to the corresponding nuclides of the radium decay series.

Diaphragm pump, two stage, 220V

Alpha and Photodetector

Pre-amplifierfor alpha detector

Container for nuclear physics exp.

PHYWE Multichannel Analyser (MCA)

measure Software multi channel analyser

Vacuum gauge DVR 2 pro, 1 … 1000

Vacuum tube, NBR, 6/14mm, 1 m

Pinchcock, width 20 mm

Tubing connector,Y-shape, ID 8-9mm

Screened cable, BNC, l = 750 mm

Radioactive source Ra-226, max. 4 kBq

Radioactive source Am-241, 3.7 kBq

  1. The alpha-spectrum of the 226Ra is recorded, the settings of the pulse analyzer (amplification) and recorder (x and y input sensitivity) being selected so as to make best possible use of the recording width.
  2. The calibration spectrum of the open 241Am-emitter is recorded at the same settings.
  3. The alpha-energies corresponding to the individual peaks of the alpha spectrum of the radium are calculated and, on the assumption of a constant energy loss in the source covering, the alpha-active nuclides of the radium decay series corresponding to the individual peaks are determined on the basis of the values in the literature.
  • Decay series
  • Radioactive equilibrium
  • Isotopic properties
  • Decay energy
  • Particle energy
  • Potential well model of the atomic nucleus
  • Tunnel effect
  • Geiger-Nuttal law
  • Semiconductor
  • Barrier layer

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Product number

P2522315

Study of the alpha energies of Ra-226 with MCA

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