Count Rate - Revision history

Ellen References at 01:06, 4 December 2019

2019-12-04T01:06:06Z

Ellen References at 04:50, 17 November 2019

2019-11-17T04:50:04Z

Ellen References at 23:04, 3 November 2019

2019-11-03T23:04:34Z

NRJC: Created page with "==Key Stage 4== ===Meaning=== '''Count rate''' is the number of particles of ionising radiation that reach a detector per second. ===About Coun..."

2019-03-09T19:35:19Z

Created page with "==Key Stage 4== ===Meaning=== '''Count rate''' is the number of particles of ionising radiation that reach a detector per second. ===About Coun..."

New page

==Key Stage 4==
===Meaning===
'''Count rate''' is the number of [[particle]]s of [[Ionising Radiation|ionising radiation]] that reach a detector per [[second]].

===About Count Rate===
: The [[SI Unit]]s of [[Count Rate|count rate]] are [[Becquerel]]s (Bq).
: '''Count rate''' is measured using a [[Geiger Counter|Geiger counter]].
: The '''count rate''' at the detector will be less than the [[radioactivity]] of the [[sample]] of [[Unstable Isotope|unstable isotope]] because the [[Ionising Radiation|ionising radiation]] spreads out in all directions equally.
: The greater the distance from the [[radioactive]] [[sample]] the lower the [[Count Rate|count rate]].
: For an [[Alpha Particle|alpha]] source the [[Count Rate|count rate]] drops to 0 beyond 5cm because the [[Alpha Particle|alpha particle]]s are [[Absorb (Physics)|absorbed]] by a few [[centimetre]]s of [[air]].
: For a [[Beta Particle|beta]] source the [[Count Rate|count rate]] drops to 0 beyond a few [[metre]]s because the [[beta Particle|beta particle]]s are [[Absorb (Physics)|absorbed]] by the several [[metre]]s of [[air]].
: For a [[gamma-ray]] source the [[Count Rate|count rate]] drops at a rate of 1/r<sup>2<sup> where r is the distance between the source and detector.

← Older revision		Revision as of 01:06, 4 December 2019
Line 25:		Line 25:
	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Count rate, page 361, GCSE Combined Science, Pearson Edexcel '']		:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Count rate, page 361, GCSE Combined Science, Pearson Edexcel '']
	:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Count rate, page 97, GCSE Physics, Pearson Edexcel '']		:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Count rate, page 97, GCSE Physics, Pearson Edexcel '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Count rate, page 199, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']

← Older revision		Revision as of 04:50, 17 November 2019
Line 20:		Line 20:
	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Count rate, radioactive sources, page 348, GCSE Combined Science Trilogy 1, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Count rate, radioactive sources, page 348, GCSE Combined Science Trilogy 1, Hodder, AQA '']
	:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Count rates, page 100, GCSE Physics; Third Edition, Oxford University Press, AQA '']		:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Count rates, page 100, GCSE Physics; Third Edition, Oxford University Press, AQA '']
		+
		+	====Edexcel====
		+
		+	:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Count rate, page 361, GCSE Combined Science, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Count rate, page 97, GCSE Physics, Pearson Edexcel '']

← Older revision		Revision as of 23:04, 3 November 2019
Line 11:		Line 11:
	: For a [[Beta Particle\|beta]] source the [[Count Rate\|count rate]] drops to 0 beyond a few [[metre]]s because the [[beta Particle\|beta particle]]s are [[Absorb (Physics)\|absorbed]] by the several [[metre]]s of [[air]].		: For a [[Beta Particle\|beta]] source the [[Count Rate\|count rate]] drops to 0 beyond a few [[metre]]s because the [[beta Particle\|beta particle]]s are [[Absorb (Physics)\|absorbed]] by the several [[metre]]s of [[air]].
	: For a [[gamma-ray]] source the [[Count Rate\|count rate]] drops at a rate of 1/r<sup>2<sup> where r is the distance between the source and detector.		: For a [[gamma-ray]] source the [[Count Rate\|count rate]] drops at a rate of 1/r<sup>2<sup> where r is the distance between the source and detector.
		+
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Count rate, page 118, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Count rate, page 130, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Count rate, radioactive sources, page 348, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Count rates, page 100, GCSE Physics; Third Edition, Oxford University Press, AQA '']