Radiation astronomy/Alpha particles/Quiz

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The trace of a single alpha particle was obtained in a spark chamber specially made for alpha particles. Credit: Wolfhart Willimczik.

Alpha particles astronomy is a lecture from the radiation astronomy department that is under development for possible inclusion in the course on the principles of radiation astronomy.

You are free to take this quiz based on alpha particle astronomy at any time.

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Quiz[edit | edit source]


1 The average energy loss of the particle per unit path length?

2 Yes or No, Beta particles (electrons) are more penetrating than alpha particles, but still can be absorbed by a few millimeters of aluminum.


3 Radiotoxic alpha radiation emitters which are expensive?


4 The time after each event during which the system is not able to record another event?

5 Complete the text:

Muromontite is a mixture of uranium and

. Alpha particles from the decay of

are captured by the beryllium atoms, which in turn release neutrons. In the case of this sample, the neutrons are in turn re-captured by the

, which then undergoes further

and is transformed into


6 True or False, A delta ray is characterized by very fast electrons produced in quantity by alpha particles or other fast energetic charged particles knocking orbiting electrons out of atoms.


7 The auroral green line at 557.7 nm has been suggested as originating from which of the following elemental emission lines?

solid nitrogen
mixtures of oxygen and helium
pure helium
pure oxygen
neon and oxygen mixtures

8 Complete the text:

Match up the item letter with each of the possibilities below:
Hydrogen - H, or D
Helium - He
Lithium - Li
Beryllium - Be
Boron - B
Carbon - C
Nitrogen - N
Oxygen - O
Fluorine - F
Neon - Ne
consumed in chromosphere fusion to produce lithium and neutrinos

isotope fusion in the chromosphere producing neutrinos

fusion in the chromosphere producing the most neutrinos

a factor of ~200 below meteorite abundance in the Sun's photosphere

detected with X-rays on the Moon

an organic form detected in Allan Hills 84001 probably from Mars

detected marginally on Venus with Chandra

found in the X-ray spectra of comets

consumed to produce beryllium and neutrinos

a surface impurity on meteorites


9 A NASA Hubble image of the Ring Nebula contains which of the following?

very hot helium blue
ionized oxygen emitting green
red light from ionized nitrogen
oxygen forbidden line emission
a forbidden line of sulfur

10 Which of the following are associated with Type-Ia supernovae as a standard candle?

lack silicon lines
lack hydrogen lines
lack helium lines
lack lithium lines
expanding photosphere method
almost as luminous as the brightest red supergiants

11 Which chemical phenomenon are associated with the Earth?

quartz is the second most abundant mineral
an atmosphere containing CO2
green, red, blue, and yellow airglow
the production and escape of hot H+ ions
oxygen emissions
helium ions

12 Complete the text:

Match up the white dwarf classification with its distinctive characteristic:
DA - A
DB - B
DC - C
DO - D
DQ - E
DX - F
DZ - G
a helium-rich atmosphere, indicated He II spectral lines

a helium-rich atmosphere, indicated He I spectral lines

spectral lines are insufficiently clear to classify

no strong spectral lines

a metal-rich atmosphere

a carbon-rich atmosphere

a hydrogen-rich atmosphere


13 Red-giant stars have (or theoretically may have) these in common:

potential 22Ne
helium-burning shells
non-standard neutrino losses
Lithium red line
N stars display F abundances up to 30 times the solar system value
RGB and AGB stars
a radius between 200 and 800 times that of the Sun

14 Which of the following is not a phenomenon associated with violet astronomy?

photographs of the planet Venus taken in 1927
the purple haze within a few arcseconds of the central star of the Homunculus
the faintness of carbon stars
the stellar abundance of aluminum
adaptive optics
the helium beta line

15 Beta rays, or beta particles, are more penetrating than what other Greek letter designated rays or particles?

16 Which of the following emission/absorption phenomena are associated with radiation astronomy?

helium lines at 501 and 505 nm
the strong C2 (1,2) band
nitrogen emission in plasmas at 566.934 nm from N VIII
helium emission line at 5876 Å
neutral iron line at 526.96 nm
calcium yellow line at 569.4 nm

Hypotheses[edit | edit source]

  1. The radiation astronomy of beta particles (electrons and positrons as a group) may provide insight into fusion reactions above the Sun's photosphere.

See also[edit | edit source]

External links[edit | edit source]

{{Radiation astronomy resources}}