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Radiation astronomy/Baryons/Quiz

Anode ray tube shows the rays passing through the perforated cathode and causing the pink glow above it. Credit: Kkmurray.

Baryon radiation astronomy is a lecture as part of the radiation astronomy course on the principles of radiation astronomy.

You are free to take this quiz based on baryon radiation astronomy at any time.

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QuizEdit







  

1

True or False, By crossing symmetry an elastic scattering cross section with a nucleon implies annihilation of dark matter (DM) into hadrons inside the halo, resulting in an anti-proton flux that could be constrained by data from the PAMELA collaboration if one includes a large boost factor necessary to explain the PAMELA excess in the positron fraction.

TRUE
FALSE

2

Which of the following are characteristic of solar proton astronomy?

the solar wind
polar coronal holes
protons originating from the photosphere
the electron neutrino
GOES 11
neutrons

3

True or False, The infrared spectra of olivine and enstatite are essentially unchanged after proton bombardment.

TRUE
FALSE

4

Which of the following are characteristic of the first true astrophysical gamma-ray source?

a strong 2.223 MeV emission line
a solar flare
the formation of deuterium
the electron neutrino
OSO-3
neutrons

5

True or False, The spin carried by quarks is not sufficient to account for the total spin of protons.

TRUE
FALSE

6

Complete the text:

The ratio of neutrons to 2.2-MeV

depends significantly on the direction of motion of the flare-accelerated particles with respect to the solar

.

7

True or False, Only relativistic neutrons would be able to reach Earth from other stars before decaying.

TRUE
FALSE

8

Which of the following are associated with the big bang neutrinos?

a launch location
relic neutrinos
of order of the photon density
the thermal energy at which neutrinos decouple
neutrinos dynamically dominate baryons
a contracting universe

9

True or False, A proton and neutron will have lower energy when their spins are anti-parallel, not parallel.

TRUE
FALSE

10

Which of the following is not a characteristic of X-rays associated with neutron stars?

X-ray jets
X-ray binary
emission peaks indicative of neutron decay
X-ray burster
a low-mass X-ray binary

11

Complete the text:

At the high end of the proton energy spectrum (above ≈ 1018 eV) the

radius deflection becomes

enough that proton astronomy becomes

.

12

Which of the following are associated with electromagnetics?

angular momentum transfer
solar wind
protons
electrons
the baryon neutrino
charge neutralization

13

Complete the text:

Match up the radiation letter with each of the detector possibilities below:
Meteors - A
Cosmic rays - B
Neutrons - C
Protons - D
Electrons - E
Positrons - F
Neutrinos - G
Muons - H
Gamma rays - I
X-rays - J
Ultraviolet rays - K
Optical rays - L
Visual rays - M
Violet rays - N
Blue rays - O
Cyan rays - P
Green rays - Q
Yellow rays - R
Orange rays - S
Red rays - T
Infrared rays - U
Submillimeter rays - V
Radio rays - W
Superluminal rays - X
multialkali (Na-K-Sb-Cs) photocathode materials

.
F547M

.
511 keV gamma-ray peak

.
F675W

.
broad-band filter centered at 404 nm

.
a cloud chamber

.
ring-imaging Cherenkov

.
coherers

.
effective area is larger by 104

.
F588N

.
pyroelectrics

.
a blemish about 8,000 km long

.
a metal-mesh achromatic half-wave plate

.
coated with lithium fluoride over aluminum

.
thallium bromide (TlBr) crystals

.
F606W

.
aluminum nitride

.
heavy water

.
18 micrometers FWHM at 490 nm

.
wide-gap II-VI semiconductor ZnO doped with Co2+ (Zn1-xCoxO)

.
a recoiling nucleus

.
high-purity germanium

.
magnetic deflection to separate out incoming ions

.
2.2-kilogauss magnet used to sweep out electrons

.

14

Which of the following are characteristic of solar proton astronomy?

the solar wind
polar coronal holes
protons originating from the photosphere
the electron neutrino
GOES 11
neutrons

15

If there was no nuclear force, all nuclei with two or more protons would fly apart because of the electromagnetic?

16

Which of the following are characteristic of the first true astrophysical gamma-ray source?

a strong 2.223 MeV emission line
a solar flare
the formation of deuterium
the electron neutrino
OSO-3
neutrons

17

True or False, If stellar flares have origins similar to solar flares, then flare stars produce neutrons.

TRUE
FALSE

18

Which of the following are characteristic of solar green astronomy?

limb faculae
polar coronal holes
black body temperature of the photosphere
the electron neutrino
iron (Fe XIV) green line
neutrons

19

True or False, Below EeV energies ultra high energy neutrons have boosted lifetimes.

TRUE
FALSE

20

Which of the following are radiation astronomy phenomena associated with the Sun?

ultraviolet emission
X-ray emission
gamma-ray emission
neutron emission
7Be emission
meteor emission


HypothesesEdit

  1. Even with the limited directionality of the neutrino data, it should be possible to decide between the solar core and the solar corona as the most likely source of neutrinos from the solar octant.

See alsoEdit

External linksEdit