Fisika Kelas 11 SMK-SMAK Bogor 2016/2017

1. GAMMA RAYS
XI.10 - Group 7

2. • Salsabilla Putri Azizah
• Thasya Afiyah Yuniar
• Tiara Pramesti Andari
Purnawan
• Vatika Kamaliyyah Zahra

3. Our Materials
Definition
Sources
Application
Characteristic
History
Wave Length
And Frequency

4. Definition
• Gamma-ray is a form of radiant energy from the
atom nuclei emission of radioactive substances
or electromagnetic radiation produced by
radioactivity or nuclear.
• Gamma-ray is often denoted by the Greek letter
gamma, 

5. History of Gamma Rays
• Antoine Henri Becquerel
Antoine Henri
Becquerel was born in
Paris , France , on
December 15, 1852 . He
found that uranium
compound had being
active radiation with
very large penetration
power, like X ray.

6. • Paul Ulrich Villard
• Gamma ray is discovered by French
chemist and physicist, Paul Ulrich
Villard in 1900 while studying the
radiation emmited from Radium,
Polonium and Uranium.
• Villard investigated the radiation from
radium salts that escaped from narrow
apperture in a shielded container onto
a photographic plate, through a thin
layer of lead that was known to stop
alpha rays.
• He found that gamma-ray can not be
deflected by magnetic fields.
History of Gamma Rays

7. • Ernest Rutherford
• At 1899, Ernest Rutherford make study
about radioactive light. He put Radium
in little tin box. The light was generated
imposed on magnetic field that very
large. Rutherford found that the light
was separated into three parts, Alfa (α),
Beta (β) and Gamma (γ).
• In 1914 he and his co-worker Edward
Andrade showed that the rays were a
type of electromagnetic radiation by
measuring the wavelengths of gamma
rays from radium (crystal diffraction)
but with shorter wavelengths thus
higher frequency.
History of Gamma Rays

9. Characteristics
• Source: radio-isotopes, nuclear reaction,
the core unstable atoms
• Description: Electromagnetic radiation
• Energy: up to 72 MeV
• Penetrating power: a very large

10. Sources of Gamma Rays
Radioactive elements
A nucleus which is in an excited state may emit one or
more photons (packets of electromagnetic radiation) of
discrete energies. The emission of gamma rays does not
alter the number of protons or neutrons in the nucleus
but instead has the effect of moving the nucleus from a
higher to a lower energy state (unstable to stable).

11. Preparation
• Gamma rays are produced from the decay of
atomic nuclei.
• Once the nucleus decays into a new core usually
there is excess energy in its core bond that is often
called the nucleus in an excited state.
• Core excess energy will usually release energy in
the form of gamma rays, known as decay gamma
rays are photons.

12. Gamma Rays Burst
• Gamma-ray bursts are
the most energetic and
luminous
electromagnetic events
since the Big Bang and
can release more energy
in 10 seconds than our
Sun will emit in its
entire 10-billion-year
expected lifetime.

13. WAVE LENGTH AND FREQUENCY
• Wave length
Gamma ray has a wavelength of 10-10
nm until 10-15 nm
• Frequency
Gamma ray has a frequncy of 1018 Hz
until 1024 Hz

14. ELECTROMAGNETIC SPECTRUM

15. The Differences between α, β, and γ
rays

18. Alfa Light
ZXA  Z-2 YA-4 + 2α4
 Beta Light
ZXA Z+1YA + -1β0
Gamma Light
AZX*  AZX + 0γ0

19. APPLICATION

20. Is one oradiosurgery or surgical radiation treatment to desctruct tumour
in the brain without having to perform surgery. The gamma knife used in the
electromagnetic waves by a radio isotop Cobalt-60.
In the implementation
1. The helmet thta contains 200 grains of Cobalt-60 on the patient’s head
2. 2. Radiation emitted, and the source of Cobalt-60 focusses on the target
In the results Cobalt-60 can produce gamma rays that can interact with the
tissues. Resulting in DNA damage and cell death in cancer.
Gamma Knife

21. CONCLUSION
• Gamma rays have the biggest energy
compered to most other.
• Gamma rays has a wavelength of 10-10 nm
until 10-15 nm and has a frequncy of
1018 Hz until 1024 Hz.
• Gamma rays is generated from
electromagnetic radiation.
• Gamma rays can not be deflected by
magnetic fields.

22. REFERENCES
• http://id.wikipedia.org/wiki/Radiasi_elektroma
gnetik
• http://www.slideshare.net/ichwandiazmir/save
dfiles?s_title=sinar-gamma-dan-sinar-
x&user_login=rifqhy999
• http://en.wikipedia.org/wiki/Henri_Becquerel