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Samenvatting Newton 4 VWO hoofdstuk 5: straling en gezondheid $3.23   Add to cart
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Samenvatting Newton 4 VWO hoofdstuk 5: straling en gezondheid
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  • Course
  • Natuurkunde
  • Level
  • VWO / Gymnasium
  • Book
  • Newton 4 VWO

Samenvatting van het hoofdstuk als in het boek. Alle formules bij elkaar.

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Document information

  • No
  • Hoofdstuk 5
  • April 30, 2021
  • 3
  • 2020/2021
  • Summary

Subjects

  • straling
  • gezondheid
  • röntgenstraling
  • alfastraling
  • betastraling
  • gammastraling
  • activiteit
  • kernreacties
  • medische beeldvorming

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  • Secondary school
  • VWO / Gymnasium
  • Natuurkunde
  • 4
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STRALING EN
GEZONDHEID
RÖNTGENSTRALING

Doordringend vermogen: hoe makkelijk de straling door stoffen beweegt.

- Adsorptie (tegenhouden) en transmissie (doorlaten)

Hoe groter de adsorptie van het materiaal, hoe kleiner de intensiteit. De adsorptie hangt af van de
materiaalsoort en de materiaaldikte.

Ioniserend vermogen: hoe goed een stralingsdeeltje in staat is om de atomen en moleculen waar het deeltje
langskomt te ioniseren.

d
1 d1
I =I 0 ∙
2 () 2




d
n=
d1
2


E=h ∙ f (met E de fotonenergie in J, f de frequentie in Hz, h de evenredigsheidsconstante 6,626*10^-34 J)

1 eV = 1,6*10^-19 J

ALFASTRALING

- Klein doordringend vermogen, hoog ioniserend vermogen.

2
Bij alfaverval komt He vrij. Behoud van massagetal en lading.
4

BÈTASTRALING

- Groter doordringend vermogen dan alfastraling. Kleiner ioniserend vermogen dan alfastraling.

Bij bètaverval komt of een elektron of een positron vrij.

1 1 0
1. n → p+
β- : e
0 1 −1
1 1 0
2. β+ : p → n+ e
1 0 1

GAMMASTRALING

- Groot doordringend vermogen, klein ioniserend vermogen (kleiner dan bèta)

Bij gammaverval zendt de kern een ϒ-deeltje uit. Dit heeft geen massa en geen lading.

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