ATOMIC PHYSICS • RADIOACTIVITY C B
Direct Delivery
A
Direct Delivery
Exclusive D
E
Ideal For
Further Education
Redesigned and Improved
A Geiger-Muller Tube Holder A cylindrical metal body 63 x 35mm diameter x depth which houses the tube socket and is mounted on a sheet metal stand with resilient rubber-strip feet. A captive coaxial connecting lead 1m long is provided, terminating in a standard BNC connector. A 2.2 MΩ protective stabilising resistor is internally wired in series with the anode connection. each £94.99
F4H27155
B Geiger-Muller Tube Mullard ZP1481 This sensitive GM tube is ideal for detecting α, β and γ radiation and is recommended as a general purpose tube. The GM tube must be used with the GM Tube Holder (see below). A removable protective mesh cap of plastic is fitted over the window and the body has a thin plastic coating. • Sensitive to α, β and γ radiation. • Threshold voltage (max.) 370V • Plateau length (min.) 100V • Operating temperature -55 to +75°C • Dead time 100µs • Anode/Cathode capacity 3.5pF • Sensitivity for 1mR/L radium 1650 counts min-1 • Window thickness 2.5 mg cm-2 • Halogen quenched metal tube with thin end window • Dimensions overall 76 x 26mm diameter each £344.99
F4A49724
Geiger-Muller Tube (Tel-X-Ometer) Comprising of a sensitive thin end window G.M. tube with mounting hardware to fit the radial arm of the Tel-XOmeter. The tube is sensitive to α, β and γ radiation and X-rays. G.M tube type LND712. To be used with Tel-X-Ometer. • Dose rate range 10-3 to 10-2 mGy/h • Window thickness 2.0 to 3.0 mg cm-2 • Bias voltage 500V • Output connector BNC Direct Delivery – up to 12 weeks each £239.99
F4F64886
C Basic Accessory Set 20 components including collimators, luminescent screen, film cassettes and all the items necessary to perform more than twenty experiments. Thin foils of nickel, copper, cobalt and zinc are used to evaluate the mass absorption coefficient. They are also used in conjunction with a Rotary Radiator which presents the above four elements, plus
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with iron, vanadium, manganese, and chromium, to the primary X-ray beam to verify Moseleys Law. A single crystal of sodium chloride is used to establish the Bragg Relationships and finely divided sodium chloride powder can be mounted in the Powder Camera to study the DebyeScherrer Pattern. Strands of wire covered with pure copper to provide the pattern for copper and finely drawn glass fibres are included so that Powder Camera experiments can be performed with materials of the users choice. The Powder Camera and film cassettes have been designed for use with the X-ray film kit described above. Direct Delivery – up to 12 weeks
F4A46826
pack £1124.99
D S-Range Scaler-Timer A general purpose scaler-timer suitable for radioactivity counting utilising Geiger-Muller tubes or solid state alpha particle detectors; and as a general purpose millisecond digital timing device with manual or electronic triggering. The bright L.E.D. has six digits, 14mm high, making it suitable for individual use or class demonstration. In the radioactivity mode an integral pre-amplifier is provided for solid state detectors and an adjustable 300 to 500V E.H.T. supply for G.M. tubes. Loudspeaker sockets are also provided for use when an audible indication of count rate is required. In the radioactivity mode, the display features ‘most significant figure’ blanking. In the timing mode, the display reads in seconds, i.e. from 0 up to 999.999s, and increments in ms. This provides a clean unambiguous display. Timing can be actuated manually or by light operated or mechanical switches and also incorporates triggered timing. Supplies of 2V and 6V a.c. at 0.5A are provided via front panel sockets for optical switch light sources, etc. • Display: six-digit 14mm bright L.E.D. • Timing oscillator: 1000Hz (1ms period) ±0.5%, typically ±0.2% • Reset: push button • Radio activity inputs: GM tube via BNC socket with integral 300-500V. supply via directly calibrated rotary control • Timing inputs: (1) Manually switched start/stop; (2) Light gate operated start/stop; (3) Mechanical switch closure start/stop; (4) Triggered timing start/stop (i.e. momentary interruption of light beam) • Outputs: 2V and 6V, 0.5A a.c.; Loudspeaker output via 4mm sockets • Mains supply: 100-120V or 220-240V, 50-60Hz via detachable three-core mains lead with I.E.C. connector and moulded on mains plug (240V version) • Power consumption: 8W • Dimensions: W380 x D140 x H165mm
F4H28925
E S-Range Digicounter A versatile counter suitable for timing, frequency, period and radioactivity measurement. A built-in high stability crystal controlled oscillator ensures a typical accuracy of 0.005% on all measuring ranges. The period measurement and display function enables very low frequencies to be measured rapidly with a high degree of accuracy. It also allows triggered timing of trolley speeds, etc., to be performed using a single light gate; and by shorting the period input, infinite radioactivity or frequency counts may be obtained. Radioactivity • Inputs: E.H.T BNC connector for a G.M. tube. Supply voltage adjustable from 300 to 500V • Counting time: 1, 10, 100 or 1000 seconds and infinity. Can be set to take a single or a continuous series of readings, each being displayed for 3 seconds before the next is taken • Rate: Obtained by dividing the count reading by the counting time • Speaker: output will feed into a speaker of any impedance • Timing Ranges: 0 to 99.9999 x 0.1ms; 0 to 999.999 x 1ms; 0 to 9999.99 x 0.01s (10ms); 0 to 99999.9 x 0.1s (100ms) • Accuracy: better than 0.005% ±1 count • Gating: (1) By manual front panel stop/start switch;(2) By make or break input sockets; (3) By triggering timing stop/ start inputs. Output 2V and 6V a.c. at 0.5A for light gate or similar amps Frequency • Inputs: (1) Low frequency, d.c. to 3MHz minimum (5MHz typical). Will operate with T.T.L inputs, light gates etc.; (2) high frequency, capacitively coupled 30Hz to 3MHz minimum (5MHz typical); (3) High gain, input voltage required 0.8mV r.m.s. from 30Hz to 20kHz; recommended microphone - high impedance dynamic type • Input impedance: 20Ω, inputs 1 and 2;100kΩ input 3 • Accuracy: Better than 0.005% -+ 1 count Period • Timing intervals: 0.1, 1, 10 and 100ms
F4H29280
each £619.99
each £431.99
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18.01.2016
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