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Presentation

SUBMITTED BY:

SUBMITTED TO:

ROLLNO:

CLASS: BS-PHYSICS

SEMESTER: 6TH

COURSE TITLE: LAB COURSE (IV)

COURSE CODE: PHY-512

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​

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TOPICS:

01

TO DETERMINE THE MAXIMUMEN ENERGY OF BETA PARTICLES AND RANGE OF BETA PARTICLES USING G.M COUNTER ASSEMBLY. �

PLEASE VISIT: WWW.TALEEMKIDUNIYA77.LOGSPOT.COM

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CONTENTS

CONTENTS

APPARATUS:

1

PROCEDURE:

2

DIAGRAM�

3

OBSERVATION

4

5

6

CALCULATION

RESULT

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APPARATUS:��

  • G.M counting system 601A/602A with A.C main chord
  • Radioactive source kit
  • Aluminum absorber set
  • G.M detector (end window) stand

OR

G.M detector /source holder bench

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PROCEDURE:�

�

 

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6. I placed a beta source in the source tray at about 3 cm from the end window of the tube.��7. I took the aluminum absorber set.�� I placed an aluminum absorber of zero thickness in the absorber holder at about 2 cm from the end window of the tube.��8. I recorded the counts. The absorber thickness is increased in steps of 0.05 mm.�9. I repeated this process until count rate is equal to or half the count rate with zero �absorber thickness.� �

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10. The collected data for standard source TI-204 And the second source Sr-90

11. The density of aluminum is 2.71 g/cm3.�

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Diagram:�

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OBSERVATION:�

COUNTING TIME : 180 SEC

BACKGROUND : 146 COUNTS

ABSORBER : ALUMINUM

SOURCE : TI-204 (4 kBq )

Absorber thickness

( in mm )

Absorber thickness in mg/cm2

Counts

Net counts (counts-BG)

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0

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0

13.55

27.10

40.65

54.20

67.75

81.30

94.85

108.40

121.95

2620

2003

1556

1293

1054

835

676

597

499

448

2474

1857

1410

1147

908

689

530

451

353

302

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Graph:��

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The below data is taken with strontium ( Sr92) .

counting time = 100 seconds

background counts = 79 counts

Absorber = Aluminum

Source = Sr-90

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Calculation:

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RESULT:� END POINT ENERGY OF BETA RAYS FROM Sr-90 IS 2.28MeV ��

THE END

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THANK YOU